has role is protonated form of biotin (3aS,4S,6aR)-Hexahydro-2-oxo-1H-thieno[3,4-d]imidazole-4-valeric acid BIOTIN Coenzyme R biotina cis-Tetrahydro-2-oxothieno(3,4-d)imidazoline-4-valeric acid biotine Vitamin H CHEBI:41236 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid 5-(2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanoic acid biotin An organic heterobicyclic compound that consists of 2-oxohexahydro-1<em>H</em>-thieno[3,4-<em>d</em>]imidazole having a valeric acid substituent attached to the tetrahydrothiophene ring. The parent of the class of biotins. cis-Hexahydro-2-oxo-1H-thieno(3,4)imidazole-4-valeric acid D-(+)-biotin CHEBI:13905 biotinum cis-(+)-Tetrahydro-2-oxothieno[3,4]imidazoline-4-valeric acid CHEBI:3108 (+)-cis-Hexahydro-2-oxo-1H-thieno[3,4]imidazole-4-valeric acid CHEBI:22884 CHEBI:22882 D-Biotin 5-[(3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoic acid vitamin B7 vitamin B7 coenzyme prosthetic group biotins biotinate mouse metabolite Saccharomyces cerevisiae metabolite Escherichia coli metabolite human metabolite fundamental metabolite