4-氧代-1,1-环己烷二羧酸1,1-二乙酯

pentane-1,3,3,5-tetracarboxylic acid tetraethyl ester

pentane-1,3,3,5-tetracarboxylic acid-3,3-diethyl ester-1,5-dibenzyl ester

对硝基甲苯