39589-98-5 5-Norbornene-2,3-dicarboxylic acid, dimethyl ester, cis-endo- Bicyclo[2.2.1]hept-5-ene-2,3-dicarboxylic acid, dimethyl ester, (endo,endo)- Compound 3916 Dimalone Dimethyl carbate NISY NSC46419