(9ci)-2-氨基-1-环戊烯-1-羧酸甲酯

4-氯-6,7-二氢-5H-环戊并嘧啶-2-胺

methyl 3-methyl-2-oxocyclopentane-1-carboxylate

5-prop-2-enylcyclopent-2-en-1-one

methyl 1-(4-bromobutyl)-2-oxocyclopentane-1-carboxylate