| 英文同义词: | octahydrospiro[[1,3]dioxolane-2,5'-[2,4,1](epiethane[1,1,2]triyl)cyclobuta[cd]pentalen]-7'-one;spiro[1,3-dioxolane-2,8'-pentacyclo[5.4.0.0^{2,6}.0^{3,10}.0^{5,9}]undecane]-11'-one;Spiro[1,3-dioxolane-2,5'(1'aH)-[1,2,4]ethanylylidene[1H]cyclobuta[cd]pentalen]-7'-one, hexahydro- |