30627-53-3 7-Oxabicyclo(2.2.1)heptane-2,3-dicarboxylic acid, p-fluorobenzyl ester, exo-(Z)- BRN 3993571 exo-cis-7-Oxabicyclo(2.2.1)heptane-2,3-dicarboxylic acid p-fluorobenzyl ester