英文别名
                        (+/-)-2-methyl-4-oxo-(4ar,8at)-4a,5,6,7,8,8a-hexahydro-4H-chromene-3-carboxylic acid ethyl ester;(+/-)-2-Methyl-4-oxo-(4ar,8at)-4a,5,6,7,8,8a-hexahydro-4H-chromen-3-carbonsaeure-aethylester;ethyl (4aR,8aR)-2-methyl-4-oxo-4a,5,6,7,8,8a-hexahydrochromene-3-carboxylate