137-76-8 Cetotiamina [INN-Spanish] Cetotiamine Cetotiamine [INN] Cetotiaminum [INN-Latin] O,S-Bis(ethoxycarbonyl)thiamine O,S-Dicarbethoxythiamine S-Ester of O-ethyl thiocarbonate with N-((4-amino-2-methyl-5-pyrimidinyl)methyl)-N-(4-hydroxy-2-mercapto-1-methyl-1-butenyl)formamide ethyl carbonate