(5S,5aS,10aR,11R)-13-methyl-2-((1R,2S,4R)-1,7,7-trimethylbicyclo[2.2.1]heptan-2-yl)-7,8,9,10-tetrahydro-1H,5H,6H,11H-5,11:5a,10a-diethenocyclohepta[d][1,2,4]triazolo[1,2-a]pyridazine-1,3(2H)-dione 生成
(-)-9-methylbicyclo<5.4.2>trideca-7,9,11(1),12-tetraene