pyrroles and morphine

Topics: Adult; Anti-Inflammatory Agents, Non-Steroidal; Carbon Dioxide; Clinical Trials as Topic; Double-Blind Method; Humans; Ketorolac; Male; Morphine; Pyrroles; Random Allocation; Respiration; Tolmetin

Topics: Abdomen; Adolescent; Adult; Aged; Anti-Inflammatory Agents, Non-Steroidal; Clinical Trials as Topic; Double-Blind Method; Drug Combinations; Humans; Infusions, Parenteral; Ketorolac Tromethamine; Middle Aged; Morphine; Pain Measurement; Pain, Postoperative; Pyrroles; Random Allocation; Tolmetin; Tromethamine

Topics: Adult; Aged; Drug Combinations; Female; Humans; Injections, Intramuscular; Ketorolac Tromethamine; Male; Middle Aged; Morphine; Pain, Postoperative; Pyrroles; Tolmetin; Tromethamine

Topics: Aminopyrine; Analgesics; Aspirin; Benzoates; Benzyl Compounds; Dextropropoxyphene; Drug Evaluation; Drug Tolerance; Ethanolamines; Female; Humans; Male; Morphine; Nausea; Pain; Pentazocine; Phenylbutazone; Pyrroles; Sleep Wake Disorders; Vertigo

Topics: Acute Disease; Administration, Oral; Adult; Cyclooxygenase Inhibitors; Female; Humans; Injections, Intramuscular; Male; Middle Aged; Morphine; Pain, Postoperative; Pyrroles; Tolmetin

Topics: Blood Pressure; Drug Evaluation; Euphoria; Humans; Morphine; Pupil; Pyrroles; Substance-Related Disorders; Surveys and Questionnaires; Tolmetin

Topics: Administration, Oral; Adult; Analgesics; Clinical Trials as Topic; Female; Humans; Injections, Intramuscular; Male; Morphine; Neoplasms; Pain, Postoperative; Pyrroles; Tolmetin

Topics: Administration, Oral; Analgesics; Clinical Trials as Topic; Double-Blind Method; Humans; Injections, Intramuscular; Morphine; Pain, Postoperative; Pyrroles; Time Factors; Tolmetin

Topics: Administration, Oral; Affect; Anti-Inflammatory Agents, Non-Steroidal; Chronic Disease; Humans; Morphine; Pain; Pain, Postoperative; Pyrroles; Research Design; Tolmetin

Topics: Analgesics, Opioid; Animals; Atropine; Carbon Dioxide; Dogs; Female; Goats; Hemodynamics; In Vitro Techniques; Indoles; Male; Mice; Morphine; Oxygen; Pyrroles; Rats; Rats, Inbred Strains; Respiration

Topics: Animals; Anticonvulsants; Disease Models, Animal; Male; Morphine; Narcotics; Pain; Peripheral Nerves; Pyrroles; Rats; Rats, Inbred Strains; Receptors, Opioid; Receptors, Opioid, kappa; Receptors, Opioid, mu; Thiophenes

Topics: Analgesics; Animals; Aspirin; Behavior, Animal; Decerebrate State; Foot; Formaldehyde; Male; Morphine; Pain; Pyrroles; Rats; Rats, Inbred Strains; Reference Standards; Thiophenes

Topics: Animals; Colon; Dose-Response Relationship, Drug; Formaldehyde; Gastrointestinal Transit; Male; Morphine; Pain; Pyrroles; Rats; Rats, Inbred Strains; Receptors, Opioid; Receptors, Opioid, kappa; Thiophenes

Topics: Animals; Atropine; Bipolar Disorder; Cats; Central Nervous System; Chlorpromazine; Dopamine; Drug Antagonism; Female; Haloperidol; Histamine H1 Antagonists; Humans; Lysergic Acid Diethylamide; Male; Morphine; Phenoxybenzamine; Propranolol; Pyrroles; Receptors, Drug; Reserpine; Tetrabenazine

Topics: Analgesics; Animals; Benzyl Compounds; Butylamines; Ethanolamines; Humans; Mice; Morphine; Nalorphine; Naloxone; Pyrroles; Stereoisomerism; Substance-Related Disorders

Topics: Analgesics; Animals; Behavior, Animal; Benzyl Compounds; Butylamines; Conditioning, Operant; Dose-Response Relationship, Drug; Electroencephalography; Ethanolamines; Humans; Lethal Dose 50; Locomotion; Male; Meperidine; Meprobamate; Methadone; Morphine; Pyrroles; Rats; Substance-Related Disorders; Time Factors

Topics: Analgesics; Animals; Benzyl Compounds; Biogenic Amines; Brain; Brain Chemistry; Butylamines; Catalepsy; Catecholamines; Cerebellum; Corpus Striatum; Dopamine; Dose-Response Relationship, Drug; Ethanolamines; Humans; Kinetics; Male; Mice; Morphine; Motor Activity; Neurons; Norepinephrine; Pyrroles; Rats; Serotonin; Stereoisomerism; Structure-Activity Relationship; Telencephalon; Time Factors

Topics: Analgesics; Animals; Cattle; Cyclooxygenase Inhibitors; Drug Interactions; Hindlimb; Humans; In Vitro Techniques; Male; Mice; Morphine; Naloxone; Platelet Aggregation; Pyrroles; Reaction Time; Receptors, Opioid; Substance-Related Disorders; Tolmetin

Topics: Animals; Animals, Newborn; Anti-Inflammatory Agents, Non-Steroidal; Anticonvulsants; Capsaicin; Electric Stimulation; Indoles; Inflammation; Injections, Intravenous; Isoindoles; Male; Morphine; Mucus; Nasal Mucosa; Pyrroles; Rats; Rats, Wistar; Receptors, Neurokinin-2; Receptors, Neurotransmitter; Substance P; Synapses; Thiophenes; Xylenes

Topics: Analgesics; Animals; Anticonvulsants; Electric Stimulation; Formaldehyde; Indoles; Inflammation; Isoindoles; Male; Mice; Mice, Inbred Strains; Morphine; Pain; Peripheral Nerves; Pyrroles; Rats; Rats, Sprague-Dawley; Substance P; Thiophenes

Topics: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer; Adenosine Triphosphate; Analgesics; Animals; Benzopyrans; Cromakalim; Glyburide; Injections, Intraventricular; Male; Methoxyhydroxyphenylglycol; Mice; Mice, Inbred Strains; Morphine; Norepinephrine; Parasympatholytics; Potassium Channels; Pyrroles; Pyrrolidines; Receptors, Opioid, kappa; Spinal Cord; Stimulation, Chemical

Topics: Adenosine Triphosphate; Analgesics; Animals; Benzopyrans; Blood Glucose; Cromakalim; Diabetes Mellitus, Experimental; Dose-Response Relationship, Drug; Enkephalin, D-Penicillamine (2,5)-; Enkephalins; Glyburide; Male; Mice; Mice, Inbred ICR; Morphine; Pain Measurement; Potassium Channels; Pyrroles; Receptors, Opioid, mu; Tetraethylammonium Compounds

Topics: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer; Analgesics; Anesthesia, Inhalation; Animals; Blood Pressure; Dose-Response Relationship, Drug; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; Enkephalin, D-Penicillamine (2,5)-; Enkephalin, Methionine; Enkephalins; Halothane; Heart Rate; Hot Temperature; Injections, Spinal; Male; Morphine; Nalbuphine; Nociceptors; Pain Threshold; Pyrroles; Pyrrolidines; Rats; Rats, Sprague-Dawley; Reaction Time; Receptors, Opioid; Reflex; Thiophenes

Topics: Adenosine Triphosphate; Animals; Behavior, Animal; Benzopyrans; Body Weight; Cromakalim; Diazoxide; Dose-Response Relationship, Drug; Female; Injections, Intraventricular; Injections, Subcutaneous; Mice; Mice, Inbred Strains; Morphine; Naloxone; Potassium Channels; Pyrroles; Substance Withdrawal Syndrome

Topics: Animals; Benzopyrans; Cromakalim; Diarrhea; Dose-Response Relationship, Drug; Gastrointestinal Motility; Guanidines; Male; Mice; Mice, Inbred Strains; Morphine; Pinacidil; Potassium Channels; Pyrroles; Vasodilator Agents

Topics: Animals; Baclofen; Benzopyrans; Cromakalim; Dose-Response Relationship, Drug; Female; Mice; Mice, Inbred Strains; Morphine; Nociceptors; Pain; Pyrroles; Receptors, Opioid, kappa; Receptors, Opioid, mu; Vasodilator Agents

Topics: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer; Analgesics, Opioid; Animals; Dose-Response Relationship, Drug; Formaldehyde; Male; Mice; Morphine; Naloxone; Naltrexone; Narcotic Antagonists; Pain Measurement; Pyrroles; Pyrrolidines; Receptors, Opioid, kappa; Receptors, Opioid, mu; Thiophenes

Topics: 3,4-Dichloro-N-methyl-N-(2-(1-pyrrolidinyl)-cyclohexyl)-benzeneacetamide, (trans)-Isomer; Acetic Acid; Analgesics; Animals; Benzofurans; Benzomorphans; Cyclazocine; Fentanyl; Gastric Emptying; Intestinal Pseudo-Obstruction; Male; Morphine; Naloxone; Naltrexone; Narcotic Antagonists; Pain; Peritoneum; Pyrroles; Pyrrolidines; Rats; Rats, Sprague-Dawley; Receptors, Opioid, kappa; Receptors, Opioid, mu; Thiophenes

Topics: Animals; Electric Stimulation; Enkephalin, Leucine-2-Alanine; Ethylketocyclazocine; Guinea Pigs; Male; Mice; Models, Chemical; Morphinans; Morphine; Muscle, Smooth; Pyrroles; Receptors, Opioid, delta; Stereoisomerism

Topics: Analgesics, Opioid; Antibody Specificity; Carbazoles; Cyclic AMP; Cyclic AMP-Dependent Protein Kinases; Enkephalin, Ala(2)-MePhe(4)-Gly(5)-; Enkephalin, Leucine-2-Alanine; Enkephalin, Methionine; Enkephalins; Enzyme Inhibitors; Indoles; Morphine; Neuroblastoma; Neurons; Phosphorylation; Precipitin Tests; Pyrroles; Receptors, Opioid, mu; Tumor Cells, Cultured

Topics: Animals; Behavior, Animal; Carbazoles; Carcinogens; Cyclic AMP-Dependent Protein Kinases; Diabetes Mellitus, Experimental; Enzyme Inhibitors; Frontal Lobe; Indoles; Male; Mice; Mice, Inbred ICR; Morphine; Morphine Dependence; Naloxone; Naphthalenes; Narcotic Antagonists; Narcotics; Norepinephrine; Phorbol 12,13-Dibutyrate; Protein Kinase C; Pyrroles; Substance Withdrawal Syndrome

Topics: Chromatography, High Pressure Liquid; Codeine; Female; Gas Chromatography-Mass Spectrometry; Hair; Humans; Male; Melanins; Morphine; Narcotics; Pyrroles; Substance Abuse Detection

Topics: Animals; Behavior, Animal; Male; Morphine; Naltrexone; Narcotic Antagonists; Protein Isoforms; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome

Topics: Analgesics, Opioid; Animals; Behavior, Animal; Excitatory Amino Acid Antagonists; Hot Temperature; Indoles; Male; Morphine; Nerve Compression Syndromes; Neurons; Nociceptors; Pain Measurement; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Glycine; Receptors, N-Methyl-D-Aspartate; Reference Values; Sciatic Nerve; Synaptic Transmission; Touch; Ventral Thalamic Nuclei

Topics: Animals; Behavior, Animal; Conditioning, Psychological; Corticotropin-Releasing Hormone; Dose-Response Relationship, Drug; Drug Interactions; Electric Stimulation; Male; Morphine; Neuropsychological Tests; Opioid-Related Disorders; Psychomotor Performance; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Secondary Prevention; Stress, Physiological

Topics: Animals; Cerebral Ventricles; Choice Behavior; Corticotropin-Releasing Hormone; Hormone Antagonists; Injections, Intraventricular; Male; Morphine; Morphine Dependence; Naloxone; Peptide Fragments; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome

Topics: Animals; Behavior, Animal; Binding Sites; Constriction, Pathologic; Disease Models, Animal; Dose-Response Relationship, Drug; Drug Tolerance; Excitatory Amino Acid Antagonists; Glycine; Indoles; Ligation; Male; Mice; Morphine; Narcotics; Neuralgia; Pain; Pain Measurement; Pain Threshold; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, N-Methyl-D-Aspartate; Sciatic Nerve; Stress, Mechanical

Topics: Animals; Disease Susceptibility; Drug Administration Schedule; Enzyme Activation; Enzyme Inhibitors; GTP-Binding Protein alpha Subunits, Gq-G11; Heterotrimeric GTP-Binding Proteins; Hyperkinesis; Indoles; Limbic System; Male; Mesencephalon; Mice; Morphine; Narcotics; Prosencephalon; Protein Isoforms; Protein Kinase C; Pyrroles; RGS Proteins; Up-Regulation

Topics: Animals; Binding, Competitive; Dose-Response Relationship, Drug; Electrophysiology; Esters; Excitatory Amino Acid Antagonists; Indicators and Reagents; Morphine; Neurons; Nociceptors; Pyrroles; Rats; Receptors, Metabotropic Glutamate; Spinal Cord; Structure-Activity Relationship; Synaptic Transmission; Thalamus

Topics: Analgesics; Animals; Brain; Carbazoles; Cyclic AMP-Dependent Protein Kinases; Dose-Response Relationship, Drug; Drug Interactions; Drug Therapy, Combination; Drug Tolerance; Enzyme Inhibitors; Indoles; Injections, Intraventricular; Isoquinolines; Male; Maleimides; Mice; Morphine; Morphine Dependence; Pain; Protein Kinase C; Protein Serine-Threonine Kinases; Pyrroles

Topics: Analgesics, Opioid; Animals; Chronic Disease; Disease Models, Animal; Enzyme Inhibitors; Indoles; Ligation; Male; Mice; Mice, Inbred ICR; Morphine; Morphine Dependence; Neuralgia; Protein Kinase C; Pyrroles; Reward; Sciatic Neuropathy; Spinal Cord; Up-Regulation

Topics: Acamprosate; Analgesics, Opioid; Animals; Antidepressive Agents, Second-Generation; Avoidance Learning; Buprenorphine; Conditioning, Operant; Dose-Response Relationship, Drug; Drug Implants; Fluoxetine; Lisuride; Male; Morphine; Naloxone; Narcotic Antagonists; Narcotics; Opioid-Related Disorders; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome; Taurine

Topics: Analgesics, Opioid; Animals; Carbazoles; Cyclic AMP-Dependent Protein Kinases; Dose-Response Relationship, Drug; Drug Tolerance; Hypothermia, Induced; Indoles; Injections, Intraventricular; Injections, Spinal; Male; Maleimides; Mice; Morphine; Pain Measurement; Protein Kinase C; Pyrroles; Tail

Topics: Animals; Behavior, Animal; Disease Models, Animal; Dose-Response Relationship, Drug; Drug Administration Routes; Excitatory Amino Acid Antagonists; Male; Morphine; Narcotics; Pain; Pain Measurement; Pain Threshold; Peripheral Nervous System Diseases; Pyrroles; Quinoxalines; Rats; Rats, Sprague-Dawley; Reaction Time; Receptors, Kainic Acid; Tetrahydroisoquinolines; Time Factors

Topics: Analgesics; Animals; Binding, Competitive; Buprenorphine; Cell Line, Tumor; CHO Cells; Cricetinae; Cricetulus; Dose-Response Relationship, Drug; Female; Guanosine 5'-O-(3-Thiotriphosphate); Guinea Pigs; Ileum; In Vitro Techniques; Macaca mulatta; Male; Mice; Mice, Inbred ICR; Morphinans; Morphine; Muscle Contraction; Pain; Pain Measurement; Pyrroles; Radioligand Assay; Rats; Receptors, Opioid, delta; Receptors, Opioid, kappa; Receptors, Opioid, mu; Sulfur Radioisotopes; Time Factors; Tritium; Vas Deferens

Topics: Amygdala; Animals; Behavior, Animal; Brain; Central Nervous System Agents; Cocaine; Conditioning, Operant; Extinction, Psychological; Heroin; Injections, Intraventricular; Learning; Male; Morphine; Nucleus Accumbens; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Reinforcement, Psychology; Septal Nuclei; Stress, Psychological

Topics: Analgesics, Opioid; Animals; Behavior, Animal; Body Temperature; Carbazoles; Cyclic AMP-Dependent Protein Kinases; Drug Implants; Drug Tolerance; Enzyme Inhibitors; Hot Temperature; Hypothermia; Indoles; Injections, Intraventricular; Isoquinolines; Male; Maleimides; Mice; Morphine; Pain; Protein Kinase C; Pyrroles; Reaction Time

Topics: Alkaloids; Analgesics, Opioid; Animals; Benzophenanthridines; Calcium Channel Blockers; Calcium Channels, L-Type; Carbazoles; Cyclic AMP; Dose-Response Relationship, Drug; Gene Expression; GTP-Binding Proteins; Hyperalgesia; Immunoblotting; Indoles; Male; Morphine; Nifedipine; Polymerase Chain Reaction; Protein Kinase C; Protein Kinase Inhibitors; Pyrroles; Rats; Rats, Wistar; RNA, Messenger; Spinal Cord

Topics: Animals; Binding, Competitive; Data Interpretation, Statistical; Dose-Response Relationship, Drug; Male; Mice; Mice, Inbred ICR; Morphinans; Morphine; Morphine Dependence; Naltrexone; Narcotic Antagonists; Narcotics; Pain Measurement; Pyrroles; Receptors, Opioid, mu; Substance Withdrawal Syndrome

Topics: Adrenergic Agents; Adrenergic Agonists; Amphetamine; Animals; Behavior, Addictive; Choice Behavior; Clonidine; Dopamine Agents; Dose-Response Relationship, Drug; Food; Heroin; Heroin Dependence; Macaca mulatta; Male; Morphine; Narcotic Antagonists; Pyrimidines; Pyrroles; Receptors, Corticotropin-Releasing Hormone; Self Administration; Substance Withdrawal Syndrome

Topics: Analgesics; Animals; Base Sequence; Chronic Pain; Drug Tolerance; Enzyme Activation; Gene Expression Regulation, Enzymologic; Male; Mice; Morphine; Neural Cell Adhesion Molecules; Oligonucleotides, Antisense; Protein Kinase C-alpha; Protein Kinase Inhibitors; Pyrroles; Receptors, Fibroblast Growth Factor; Receptors, Opioid, kappa; Signal Transduction; Time Factors

Topics: Analgesics, Opioid; Animals; Autoradiography; Benzamides; Caudate Nucleus; Cyclic AMP Response Element-Binding Protein; Dopamine Agonists; Dopamine Antagonists; Genes, fos; Immunohistochemistry; In Situ Hybridization; Male; Morphine; Piperazines; Proto-Oncogene Proteins c-fos; Putamen; Pyridines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Dopamine D4; Transcription Factors

Topics: Animals; Behavior, Animal; Disease Models, Animal; Dose-Response Relationship, Drug; Male; Mice; Morphine; Motor Activity; Narcotics; Obsessive-Compulsive Disorder; Peptide Fragments; Peptides, Cyclic; Pyrimidines; Pyrroles; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome

Topics: Animals; Corticosterone; Dopamine; Male; Morphine; Morphine Dependence; Naloxone; Neurons; Norepinephrine; Nucleus Accumbens; Phosphorylation; Proto-Oncogene Proteins c-fos; Pyrimidines; Pyrroles; Rats; Rats, Sprague-Dawley; Receptors, Corticotropin-Releasing Hormone; Serine; Substance Withdrawal Syndrome; Tyrosine 3-Monooxygenase; Ventral Tegmental Area

Topics: Animals; Brain; Corpus Striatum; Genes, Immediate-Early; Male; Maze Learning; Mice; Mice, Inbred C57BL; Mice, Inbred DBA; Minocycline; Morphine; Motor Activity; Pyrroles; Species Specificity

Topics: Analgesics, Opioid; Animals; Disease Models, Animal; Freund's Adjuvant; Ganglia, Spinal; Hyperalgesia; Indoles; Inflammation; Injections, Subcutaneous; Male; Mice; Mice, Inbred Strains; Morphine; Pain; Phosphorylation; Protein Kinase C-alpha; Pyrroles; Receptors, Opioid, mu; Spinal Cord

Topics: Animals; Conditioning, Operant; Hormone Antagonists; Locus Coeruleus; Male; Mice; Morphine; Morphine Dependence; Narcotics; Neurons; Nucleus Accumbens; Pyrimidines; Pyrroles; Random Allocation; Receptors, Corticotropin-Releasing Hormone; Reward; Spatial Behavior; Ventral Tegmental Area

Topics: Animals; Blotting, Western; Cells, Cultured; Conditioning, Psychological; Cyclic AMP Response Element-Binding Protein; Dentate Gyrus; Fluorescent Antibody Technique; Immunoenzyme Techniques; Male; Mice; Morphine; Morphine Dependence; Narcotics; Neurons; Phosphorylation; Pyrimidines; Pyrroles; Receptors, Corticotropin-Releasing Hormone; Thioredoxins

Topics: Affect; Analgesics, Opioid; Animals; Basolateral Nuclear Complex; Brain-Derived Neurotrophic Factor; Conditioning, Classical; Corticosterone; Corticotropin-Releasing Hormone; Cyclic AMP Response Element-Binding Protein; Dentate Gyrus; Extinction, Psychological; Male; Memory; Mice; Mitogen-Activated Protein Kinase 1; Mitogen-Activated Protein Kinase 3; Morphine; Naloxone; Narcotic Antagonists; Protein Precursors; Pyrimidines; Pyrroles; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome

Topics: Analgesics, Opioid; Animals; Cell Differentiation; GATA3 Transcription Factor; Interferon-gamma; Interleukin-4; Male; Mice, Inbred C57BL; Morphine; Naltrexone; Narcotic Antagonists; Protein Kinase C-theta; Pyrroles; Quinazolines; T-Lymphocytes, Helper-Inducer

Topics: Amino Acids; Apoproteins; Binding Sites; Humans; Ligands; Lipid Bilayers; Molecular Docking Simulation; Molecular Dynamics Simulation; Morphinans; Morphine; Naloxone; Phosphatidylcholines; Protein Binding; Protein Conformation, alpha-Helical; Pyrroles; Receptors, Opioid, mu; Solutions; Water

Topics: Animals; Avoidance Learning; Conditioning, Operant; Extinction, Psychological; Hypothalamo-Hypophyseal System; Male; Memory; Mice; Mice, Inbred C57BL; Morphine; Morphine Dependence; Naloxone; Narcotic Antagonists; Narcotics; Pituitary-Adrenal System; Pyrimidines; Pyrroles; Receptors, Corticotropin-Releasing Hormone; Substance Withdrawal Syndrome

Topics: Animals; Animals, Newborn; Epithelial Cells; Epithelium; Female; Fetal Death; Fetus; Haplorhini; Histocytochemistry; Ileum; Inclusion Bodies; Intestinal Mucosa; Intestine, Small; Lymph Nodes; Macaca mulatta; Meconium; Microscopy, Electron; Papio; Pigments, Biological; Pregnancy; Pyrroles

Topics: Azo Compounds; Bile; Bile Pigments; Bilirubin; Chromatography, Thin Layer; Diazonium Compounds; Gallbladder; Gestational Age; Humans; Infant, Newborn; Infant, Premature; Intestines; Meconium; ortho-Aminobenzoates; Pyrroles