Dimethyl 1,3-acetonedicarboxylate Dimethyl Glutarate Triethyl citrate Diethyl 1,3-acetonedicarboxylate 1,2,3,4-Cyclobutanetetracarboxylic Dianhydride 4-CARBETHOXY-3-METHYL-2-CYCLOHEXEN-1-ONE N-(4-NITROBENZOYL)-L-GLUTAMIC ACID DIETHYL ESTER METHYL 4-ACETYL-5-OXOHEXANOATE DIETHYL 1,2-CYCLOPROPANEDICARBOXYLATE