| 4-(dimethylamino)benzaldehyde | A member of the class of benzaldehydes that is benzaldehyde carrying a dimethylamino substituent at position 4. Used as an indicator for detection of indoles and hydrazine. | 4-(dimethylamino)benzaldehyde |
| 4-methylumbelliferyl butyrate | A member of the class of coumarins that is 4-methylumbelliferone in which the hydroxyl hydrogen is replaced by a butyryl group. | 4-methylumbelliferyl butyate |
| 4-methylumbelliferyl glucoside | A beta-D-glucoside having a 4-methylumbelliferyl substituent at the anomeric position. | 4-methylumbelliferyl beta-D-glucoside |
| 4-methylumbelliferyl glucuronide | A beta-D-glucosiduronic acid having a 4-methylumbelliferyl substituent at the anomeric position. A hyaluronan synthesis inhibitor, it is anti-tumourigenic for various malignant tumours. | 4-methylumbelliferone beta-D-glucuronide |
| 4-methylumbelliferyl-galactopyranoside | A beta-D-galactoside having a 4-methylumbelliferyl substituent at the anomeric position. | 4-methylumbelliferyl beta-D-galactoside |
| 4-nitrocatechol sulfate | An aryl sulfate that is 4-nitrocatechol in which the hydroxy group that is meta to the nitro group has been converted into the corresponding hydrogen sulfate. It is used (commonly as its dipotassium salt) as a chromogenic substrate for sulphatase. | 2-hydroxy-5-nitrophenyl hydrogen sulfate |
| 4-nitrophenyl alpha-glucoside | An alpha-D-glucoside that is beta-D-glucopyranose in which the anomeric hydroxy hydrogen is replaced by a 4-nitrophenyl group. | 4-nitrophenyl alpha-D-glucoside |
| 4-nitrophenyl beta-d-glucoside | A beta-D-glucoside that is beta-D-glucopyranose in which the anomeric hydroxy hydrogen is replaced by a 4-nitrophenyl group. | 4-nitrophenyl beta-D-glucoside |
| 4-nitrophenyl beta-d-xyloside | A xyloside that is beta-D-xylopyranose in which the anomeric hydroxy hydrogen is replaced by a 4-nitrophenyl group. | 4-nitrophenyl beta-D-xyloside |
| 4-nitrophenyl-2-acetamido-2-deoxy-beta-d-glucopyranoside | An N-acetyl-beta-D-glucosaminide in which the anomeric hydroxy hydrogen is replaced by a 4-nitrophenyl group. | 4-nitrophenyl N-acetyl-beta-D-glucosaminide |
| 4-nitrophenyl-alpha-l-fucoside | An alpha-L-fucoside that is alpha-L-fucopyranose in which the anomeric hydroxy hydrogen is replaced by a 4-nitrophenyl group. | 4-nitrophenyl alpha-L-fucoside |
| 4-nitrophenylglucuronide | A beta-D-glucosiduronic acid having a 4-nitrophenyl substituent at the anomeric position. | 4-nitrophenyl beta-D-glucuronide |
| 5-bromo-4-chloro-3-indolyl beta-galactoside | An indolyl carbohydrate that is the beta-D-galactoside of 3-hydroxy-1H-indole in which the indole moiety is substituted at positions 4 and 5 by chlorine and bromine, respectively. It is used to test for the presence of an enzyme, beta-galactosidase, which cleaved the glycosidic bond to give 5-bromo-4-chloro-3-hydroxy-1H-indole, which immediately dimerises to give an intensely blue product. | 5-bromo-4-chloro-3-indolyl beta-D-galactoside |
| 5-bromo-4-chloro-3-indoxyl phosphate | An aryl phosphate that is indoxyl phopshate in which the indole moiety is substituted at positions 4 and 5 by chlorine and bromine, respectively. It is used to test for the presence of an enzyme, alkaline phosphatase, which cleaves the phosphate group to give 5-bromo-4-chloroindoxyl, which immediately dimerises to give an intensely blue product. | 5-bromo-4-chloro-3-indolyl phosphate |
| 5-bromo-4-chloroindoxyl acetate | An acetate ester obtained by formal condensation of the carboxy group of acetic acid with the hydroxy group of 5-bromo-4-chloroindoxyl. | 5-bromo-4-chloro-3-indolyl acetate |
| 6-bromo-2-naphthyl-beta-galactopyranoside | A beta-D-galactoside having a 6-bromo-2-naphthyl substituent at the anomeric position. | 6-bromo-2-naphthyl beta-D-galactoside |
| arginine beta-naphthylamide | An L-arginine derivative that is the amide obtained by formal condensation of the carboxy group of L-arginine with the amino group of 2-naphthylamine. | L-arginine 2-naphthylamide |
| aspartic acid beta-naphthylamide | An L-aspartic acid derivative that is the amide obtained by formal condensation of the alpha-carboxy group of L-aspartic acid with the amino group of 2-naphthylamine. | N-(alpha-L-aspartyl)-2-naphthylamine |
| benzoyltyrosine ethyl ester | An L-tyrosine derivative that is the ethyl ester of N-benzoyltyrosine. | ethyl N-benzoyl-L-tyrosinate |
| beta-naphthyl phosphate | An aryl phosphate resulting from the formal condensation of phosphoric acid with 1 mol eq. of 2-naphthol. It is a substrate for phosphatase. | 2-naphthyl dihydrogen phosphate |
| gamma-glutamyl-2-naphthylamide | An L-glutamic acid derivative that is the amide obtained by formal condensation of the alpha-carboxy group of L-glutamic acid with the amino group of 2-naphthylamine. | N-(alpha-L-glutamyl)-2-naphthylamine |
| glycylphenylalanine 2-naphthylamide | An N-(2-naphthyl)carboxamide obtained by formal condensation of the carboxy group of glycyl-L-phenylalanine with the amino group of 2-naphthylamine. | glycyl-L-phenylalanine 2-naphthylamide |
| L-histidine 2-naphthylamide | An L-histidine derivative that is the amide obtained by formal condensation of the carboxy group of L-histidine with the amino group of 2-naphthylamine. | L-histidine 2-naphthylamide |
| leucine-beta-naphthylamide | An L-leucine derivative that is the amide obtained by formal condensation of the carboxy group of L-leucine with the amino group of 2-naphthylamine. | L-leucine 2-naphthylamide |
| nitrophenylgalactosides | A beta-D-galactoside having a 2-nitrophenyl substituent at the anomeric position. | 2-nitrophenyl beta-D-galactoside |
| phenylalanine-beta-naphthylamide | An L-phenylalanine derivative that is the amide obtained by formal condensation of the carboxy group of L-phenylalanine with the amino group of 2-naphthylamine. | L-phenylalanine 2-naphthylamide |
| phenylpyruvic acid | A 2-oxo monocarboxylic acid that is 3-phenylpropanoic acid substituted by an oxo group at position 2. It is an intermediate metabolite in the phenylalanine pathway. | keto-phenylpyruvic acid |