TRICYCLO(3.2.2.02,4-)NON-8-ENE-6,7-DICARBOXYLIC ACID, MONOETHYL ESTER, (1.ALPHA.,2.BETA.,4.BETA.,5.ALPHA.,6.ALPHA.,7.ALPHA.)-
tricyclo(3.2.2.02,4-)non-8-ene-6,7-dicarboxylic acid, monoethyl ester, (1.alpha.,2.beta.,4.beta.,5.alpha.,6.alpha.,7.alpha.)-