10-Formylpteroic acid 119-20-0 Benzoic acid, 4-[[(2-amino-1,4-dihydro-4-oxo-6-pteridinyl)methyl]formylamino]- Benzoic acid, p-[N-[(2-amino-4-hydroxy-6-pteridinyl)methyl]formamido]- Factor Streptococcus lactis R Formylpteroic acid NSC133098 RHIZOPTERIN S.L.R. Factor Streptococcus lactis R factor