10-Formylpteroic acid 119-20-0 Benzoic acid, 4-(((2-amino-1,4-dihydro-4-oxo-6-pteridinyl)methyl)formylamino)- (9CI) Benzoic acid, p-(N-((2-amino-4-hydroxy-6-pteridinyl)methyl)formamido)- (8CI) Factor Streptococcus lactis R Formylpteroic acid NSC 133098 Rhizopterin Rhizopterine