3,8-Dioxatricyclo[5.1.0.02,4]octane-5,6-dicarboxylic acid, monomethyl ester 3,8-Dioxatricyclo[5.1.0.02,4]octane-5,6-dicarboxylic acid, monomethyl ester, (1.alpha.,2.beta.,4.beta.,5.alpha.,6.beta.,7.alpha.)- 52183-74-1 NSC255046