1 APT 2-amino-6-[(4-carboxy-phenylamino)-methyl]-4-hydroxy-pteridin-1-ium 1.000 2 22D 4-{[(2-amino-4-oxo-3,4-dihydropteridin-6-yl)methyl]amino}benzoic acid 1.000 3 78H 7,8-dihydropteroate 1.000 4 PT1 Pteroic acid 1.000 5 03O 4-({[(6s)-2-amino-5-methyl-4-oxo-3,4,5,6,7,8-hexahydropteridin-6-yl]methyl}amino)benzoic acid 0.958 6 FNX (4as,6s)-2-amino-6-{(E)-[(4-methylphenyl)imino]methyl}-4-oxo-4,6,7,8-tetrahydropteridine-5(4ah)-carbaldehyde 0.840 7 PD8 Phosphorylated dihydropteroate 0.786