(2-exo,3-exo,5-endo)-5-(Hydroxymethyl)-7-oxabicyclo(2.2.1)heptane-2,3-dicarboxylic acid 109282-32-8 7-Oxabicyclo(2.2.1)heptane-2,3-dicarboxylic acid, 5-(hydroxymethyl)-, (2-exo,3-exo,5-endo)-