... deliver and the best service Product Name:Biotin, D-Biotin, vitamin HAppearance :White fine powderCas NO:25 ... 2-oxo-1H-thieno[3,4-d]imidazole-4-pentanoic acid; Vitamin H (D-Biotin); D-Biotin pure; VH; 5-(2- ... oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl ... 5-[(3aR,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl]pentanoate; VHSpecification1% /2% /99% ...