5,6,7,8-Tetrahydromethanopterin 92481-94-2 H4MPT Pentitol, 1-(4-((1-(2-amino-1,4,5,6,7,8-hexahydro-7-methyl-4-oxo-6-pteridinyl)ethyl)amino)phenyl)-1-deoxy-5-O-(5-O-((1,3-dicarboxypropoxy)hydroxyphosphinyl)-alpha-D-ribofuranosyl)-, (16alpha)-