ethyl 2-cyano-3,3-dimethylpent-4-enoate

2-氯-4-甲基-烟酸乙酯

diethyl 3-ethyl-1H-pyrrole-2,4-dicarboxylate

2-cyclohexylidenepropanenitrile

6-氨基-1-丙基尿嘧啶