5-Norbornene-2,3-dicarboximide, N-(p-nitrophenyl)-, (Z)-endo- RB8885000 cis-3,6-Endomethylene-1,2,3,6-tetrahydrophthalic acid N-(4-nitrophenyl)imide cis-endo-N-(p-Nitrophenyl)-5-norbornene-2,3-dicarboximide