(E)-methyl 6-chloro-5-hydroxy-7-oxonon-5-enoate

4-氨基-6-乙氧基吡啶甲酸甲酯

methyl 1-hydroxycyclobutane-1-carboxylate

7-amino-5-methoxy-2,4-dimethyl-1,6-naphthyridine-8-carbonitrile

5-amino-7-methoxy-2,4-dimethyl-1,6-naphthyridine-8-carbonitrile