1,3-dimethyl-5,6,7,8-tetrahydronaphthalene-2-carboxylic acid

(Z,4E)-4-(7-methoxy-3,7-dimethyloctylidene)-3-methylpent-2-enedioic acid

4-甲氧基-2,6-二甲基苯甲酸甲酯

methyl 8,8-dimethoxy-1,5-dimethyl-3-oxo-2-oxabicyclo[2.2.2]oct-5-ene-6-carboxylate