(2E)-3-phenyl-2-propenyl (1R,2S)-4-methylene-2-{[(2E)-3-phenyl-2-propenyloxycarbonyl]amino}cyclopentanecarboxylate

Meso-1.2.3.4-丁烷四羧酸

tetraethyl butane-1,2,3,4-tetracarboxylate

diethyl 4-methylenecyclopentane-1,2-dicarboxylate

4-氧代环戊烷-1,2-二羧酸二乙酯