"Biotin_sulfoxide" . . . "(D)-Biotin-d-sulfoxide" . . . . . . . . . . . . "Biotin sulfoxide" . "Biotin sulfoxide" . "5-[(3aS,4S,6aR)-2,5-Dioxooctahydro-5\u03BB4-thieno[3,4-d]imidazol-4-yl]pentanoic acid" .