p. 3178 - 3183
(2007/10/02)7a-ethyl-3a-hydroxy-5-(2,4-dimethoxyphenyl)-2β,3,3aβ,4β,7,7aβ-hexahydro-2,4-methano-1H-inden-1-one
5-ethyl-2-endo-(2-methoxyethyl)-2-exo-(2,4-dimethoxyphenyl)bicyclo<3.2.1>octane-6,8-dione
5-ethyl-2-exo-(2-methoxyethyl)-2-endo-(2,4-dimethoxyphenyl)bicyclo<3.2.1>octane-6,8-dione