thiamine thiamine(1+) aldehyde 263.097 263.33986 3-[(4-amino-2-methylpyrimidin-5-yl)methyl]-4-methyl-5-(2-oxoethyl)-1,3-thiazol-3-ium C12H15N4OS CHEBI:26947 CHEBI:27824 CHEBI:9535 InChI=1S/C12H15N4OS/c1-8-11(3-4-17)18-7-16(8)6-10-5-14-9(2)15-12(10)13/h4-5,7H,3,6H2,1-2H3,(H2,13,14,15)/q+1 KEGG:C05856 Thiamin aldehyde Thiamine aldehyde YLTKXCQXTWMOIT-UHFFFAOYSA-N [H]C(=O)Cc1sc[n+](Cc2cnc(C)nc2N)c1C chebi_ontology heteroarenecarbaldehyde