Pyrazoles - ț̢
Azoles of two nitrogens at the 1,2 positions, next to each other, in contrast with IMIDAZOLES in which they are at the 1,3 positions.
Synonyms :
Pyrazolones - ț̢
Compounds with a five-membered heterocyclic ring with two nitrogens and a keto OXYGEN. Some are inhibitors of TNF-ALPHA production.
Synonyms : Pyrazolin-5-Ones, Pyrazolin 5 Ones
Pyrenes - ț̢
A group of condensed ring hydrocarbons.
Synonyms :
Pyrethrins - ț̢
The active insecticidal constituent of CHRYSANTHEMUM CINERARIIFOLIUM flowers. Pyrethrin I is the pyretholone ester of chrysanthemummonocarboxylic acid and pyrethrin II is the pyretholone ester of chrysanthemumdicarboxylic acid monomethyl ester.