英文别名
                        1,3-Dioxo-5,5,8a-trimethyl-4,4a-methano-1,3,4,5,6,7,8,8a-octahydro-2-benzopyran;(1Ar-(1aalpha,4abeta,8as(*)))-4a,8,8-trimethyloctahydrobenzo(c)cyclopropa(d)pyran-2,4-dione;4a,8,8-trimethyl-1a,5,6,7-tetrahydro-1H-cyclopropa[d]isochromene-2,4-dione