p. 1316 - 1323
(2007/10/02)1,2-diphenyl-3,5-dimethyl-6,7-dibenzyloxycarbonyl-4-oxo-6,7-diazabicyclo<3.2.0>hept-2-ene
1,2-diphenyl-3,5-dimethyl-6-benzyloxycarbonyl-4-oxo-6,7-diazabicyclo<3.2.0>hept-2-ene
1,2-diphenyl-3,5-dimethyl-4-oxo-6,7-diazabicyclo<3.2.0>hept-2-ene
2,5-dimethyl-3,4-diphenylcyclopenta-2,4-dienone
2,3-Diacetyl-1,4-dimethyl-5,6-diphenyl-2,3-diaza-bicyclo[2.2.1]hept-5-en-7-one