Substance | Relationship Strength | Studies | Trials | Classes | Roles |
1-methyl-3-isobutylxanthine 1-Methyl-3-isobutylxanthine: A potent cyclic nucleotide phosphodiesterase inhibitor; due to this action, the compound increases cyclic AMP and cyclic GMP in tissue and thereby activates CYCLIC NUCLEOTIDE-REGULATED PROTEIN KINASES. 3-isobutyl-1-methylxanthine : An oxopurine that is xanthine which is substituted at positions 1 and 3 by methyl and isobutyl groups, respectively. | 2.13 | 1 | 0 | 3-isobutyl-1-methylxanthine | |
papaverine Papaverine: An alkaloid found in opium but not closely related to the other opium alkaloids in its structure or pharmacological actions. It is a direct-acting smooth muscle relaxant used in the treatment of impotence and as a vasodilator, especially for cerebral vasodilation. The mechanism of its pharmacological actions is not clear, but it apparently can inhibit phosphodiesterases and it may have direct actions on calcium channels.. papaverine : A benzylisoquinoline alkaloid that is isoquinoline substituted by methoxy groups at positions 6 and 7 and a 3,4-dimethoxybenzyl group at position 1. It has been isolated from Papaver somniferum. | 2.13 | 1 | 0 | benzylisoquinoline alkaloid; dimethoxybenzene; isoquinolines | antispasmodic drug; vasodilator agent |
pentoxifylline [no description available] | 2.13 | 1 | 0 | oxopurine | |
rolipram [no description available] | 2.13 | 1 | 0 | pyrrolidin-2-ones | antidepressant; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor |
zardaverine zardaverine: structure given in first source. zardaverine : A pyridazinone derivative in which pyridazin-3(2H)-one is substituted at C-6 with a 4-(difluoromethoxy)-3-methoxyphenyl group. It is a phosphodiesterase inhibitor, selective for PDE3 and 4. | 2.13 | 1 | 0 | organofluorine compound; pyridazinone | anti-asthmatic drug; bronchodilator agent; EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; peripheral nervous system drug |
5-nitroquinoline [no description available] | 2.13 | 1 | 0 | | |
2-amino-4,6-dimethyl pyrimidine 2-amino-4,6-dimethyl pyrimidine: structure in first source | 2.13 | 1 | 0 | aminopyrimidine | |
5-nitroindazole [no description available] | 2.13 | 1 | 0 | | |
7-chloro-4-hydroxyquinoline 7-chloro-4-hydroxyquinoline: structure given in first source | 2.13 | 1 | 0 | | |
ethyl 3-amino-1h-pyrazole-4-carboxylate ethyl 3-amino-1H-pyrazole-4-carboxylate: structure in first source | 2.02 | 1 | 0 | | |
9-(2-hydroxy-3-nonyl)adenine (2R,3S)-EHNA : EHNA of absolute configuration 2R,3S. Selective inhibitor of cGMP-stimulated phosphodiesterase (PDE2) (IC50 = 0.8 - 4 mM). Also a potent inhibitor of adenosine deaminase. | 2.13 | 1 | 0 | EHNA | EC 3.1.4.* (phosphoric diester hydrolase) inhibitor; EC 3.5.4.4 (adenosine deaminase) inhibitor |
cilomilast [no description available] | 2.13 | 1 | 0 | methoxybenzenes | |
rp 73401 piclamilast: an antiasthmatic agent and phosphodiesterase 4 inhibitor; structure in first source. piclamilast : A monocarboxylic acid amide resulting from the formal condensation of the carboxy group of 3-(cyclopentyloxy)-4-methoxybenzoic acid with the primary amino group of 3,5-dichloropyridin-4-amine. | 2.13 | 1 | 0 | aromatic ether; benzamides; chloropyridine; monocarboxylic acid amide | anti-asthmatic drug; anti-inflammatory agent; bronchodilator agent; phosphodiesterase IV inhibitor |
2-amino-4-methyl-3-nitropyridine [no description available] | 2.13 | 1 | 0 | | |
rolipram (-)-rolipram : The (R)-enantiomer of rolipram. | 2.13 | 1 | 0 | rolipram | |
mesopram mesopram: a potent & selective type IV phosphodiesterase inhibitor | 2.13 | 1 | 0 | | |
roflumilast [no description available] | 2.13 | 1 | 0 | aromatic ether; benzamides; chloropyridine; cyclopropanes; organofluorine compound | anti-asthmatic drug; phosphodiesterase IV inhibitor |
baohuoside i baohuoside I: structure given in first source; isolated from the herb Epimedium davidii | 2.13 | 1 | 0 | glycosyloxyflavone | anti-inflammatory agent; antineoplastic agent; apoptosis inducer; plant metabolite |
rs 25344 RS 25344: inhibits phosphodiesterase PDE-4D3; structure given in first source | 2.13 | 1 | 0 | | |
sildenafil sildenafil : A pyrazolo[4,3-d]pyrimidin-7-one having a methyl substituent at the 1-position, a propyl substituent at the 3-position and a 2-ethoxy-5-[(4-methylpiperazin-1-yl)sulfonyl]phenyl group at the 5-position. | 2.13 | 1 | 0 | piperazines; pyrazolopyrimidine; sulfonamide | EC 3.1.4.35 (3',5'-cyclic-GMP phosphodiesterase) inhibitor; vasodilator agent |
2-methyl-4(3h)-quinazolinone 2-methyl-4(3H)-quinazolinone: from Bacillus cereus; structure given in first source | 2.13 | 1 | 0 | | |
4-hydroxyquinazoline 4-oxo-3,4-dihydroquinazoline: structure in first source | 2.13 | 1 | 0 | quinazolines | |
bay 73-6691 BAY 73-6691: potent and selective inhibitor of phosphodiesterase 9; structure in first source | 2.13 | 1 | 0 | | |
bay 60-7550 [no description available] | 2.13 | 1 | 0 | | |