_:b665936404 . _:b665887810 . _:b665863513 . _:b665912107 . "An organic heterobicyclic compound that consists of 2-oxohexahydro-1H-thieno[3,4-d]imidazole having a valeric acid substituent attached to the tetrahydrothiophene ring. The parent of the class of biotins." . _:b665184182 . _:b665208479 . _:b665807001 . _:b665936404 . _:b665863513 . _:b665887810 . _:b665831298 . _:b665887810 . _:b665807001 . _:b665208479 . _:b665936404 . _:b665912107 . _:b665863513 . _:b665184182 . _:b665831298 . _:b665807001 . _:b665887810 . _:b665184182 . _:b665208479 . _:b665912107 . "biotin" . . _:b665831298 . _:b665887810 . _:b665208479 . . _:b665831298 . _:b665912107 . _:b665936404 . _:b665863513 . _:b665807001 . _:b665208479 . _:b665807001 . _:b665831298 . . _:b665184182 . _:b665184182 . _:b665863513 . "biotin" . _:b665912107 . _:b665936404 . .