英文同义词: | Pentacyclo[6.3.0.0(2,7).0(4,11).0(5,9)]undecan-3-one;hexahydro-1H-2,4,1-(epiethane[1,1,2]triyl)cyclobuta[cd]pentalen-5(1aH)-one;1,2,4-Ethanylylidene-1H-cyclobuta[cd]pentalen-5(1aH)-one, hexahydro-;Hexahydro-1,2,4-ethanylylidene-1H-cyclobuta[cd]pentalen-5(1aH)-one |