di-tert-butyl N-<4-<6-(2-amino-3-cyano-5,6,7,8-tetrahydropyrido<4,3-b>pyridino)>benzoyl>glutamate

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

diethyl N-<4-<7-(2-acetamido-5-deaza-4(3H)-oxo-6,7,8,9-tetrahydropyrido<3,4-g>pteridino)>benzoyl>-L-glutamate

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

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