2,4-diamino-7-(4-carboxyphenyl)-5-deaza-6,7,8,9-tetrahydropyrido<3,4-g>pteridine

L-7,10-ethano-5-deazafolic acid

2,4-bis(pivaloylamino)-7-(4-carboxyphenyl)-5-deaza-6,7,8,9-tetrahydropyrido<3,4-g>pteridine

di-tert-butyl N-<4-<7-<2,4-bis(pivaloylamino)-5-deaza-6,7,8,9-tetrahydropyrido<3,4-g>pteridino>>benzoyl>glutamate

4-(2-Amino-4-oxo-3,5,7,8-tetrahydro-4H-1,3,6,9-tetraaza-anthracen-6-yl)-benzoic acid