1,1,2,3-丙烷四甲酸四甲酯

dimethyl 1,4-dihydroxynaphthalene-2,3-dicarboxylate

2,3-bis(3,4-dimethoxybenzyl)-4-methoxy-4-oxobutanoic acid

dimethyl 2-methoxybutanedioate

meso-Tartaric acid dimethyl ester