butyl 4-(2-(2,4-diaminopyrido[3,2-d]pyrimidin-6-yl)ethyl)benzoate

dimethyl 4-amino-4-deoxy-10-carboxy-8,10-dideazapteroate

4-(3-oxobuten-1-yl)benzoic acid

methyl 4-((1E,4E)-5-(dimethylamino)-3-oxopenta-1,4-dien-1-yl)benzoate

4-((E)-5-Dimethylamino-3-oxo-pent-4-enyl)-benzoic acid methyl ester