94294-32-3
3a,5-endo-6-trichloro-6a-ethoxy-4,4-dimethoxy-3-methyl-3,5-methanohexahydrocyclopentapyrrol-2(1H)-one

94323-92-9
(5E)-3a-chloro-5-(chloromethylidene)-4,4-dimethoxy-6a-methyl-6H-cyclopenta[c]pyrrole-1,3-dione

参考文献

Thompson, Hugh W.; Wong, Jesse K.; Lalancette, Roger A.; Boyko, Jean A.; Robertiello, Anthony M. Journal of Organic Chemistry, 1985 , vol. 50, # 12 p. 2115 - 2121