英文名称
1-[1-(3,3a,5-trimethyl-2-oxo-1,3,3b,4,6,6a,7,7a-octahydrocyclopenta[a]pentalene-5-carbonyl)oxy-3a,5-dimethyl-3-methylidene-2-oxo-4,6,6a,7-tetrahydro-3bH-cyclopenta[a]pentalene-5-carbonyl]oxy-3a,5-dimethyl-3-methylidene-2-oxo-4,6,6a,7-tetrahydro-3bH-cyclopenta[a]pentalene-5-carboxylic acid