2-carbomethoxy-4-(4'-carbomethoxyphenyl)cyclohexanone

pteroic acid

4-(4-carbomethoxyphenyl)-2,4-dicarbomethoxycyclohexanone

methyl 4-amino-4-deoxy-5,10-ethano-5,10-dideazapteroate

4-(1,3-Diamino-5,6,7,8,9,10-hexahydro-pyrimido[4,5-c]isoquinolin-8-yl)-benzoic acid methyl ester