乙基1-(氯甲酰基)-3-环戊烯-1-羧酸酯

(1-aminocyclopent-3-en-1-yl)methanol

cyclopent-3-ene-1,1-dicarboxylic acid

cyclopent-3-en-1-ylmethyl(dimethyl)silane

diethyl cyclopent-2-ene-1,1-dicarboxylate