10238-39-8 804-30-8 Formamide, N-((4-amino-2-methyl-5-pyrimidinyl)methyl)-N-(4-hydroxy-1-methyl-2-((tetrahydrofurfuryl)dithio)-1-butenyl)-, hydrochloride TTFD hydrochloride Thiamine tetrahydrofurfuryl disulfide hydrochloride