7-Oxabicyclo(4.1.0)hept-3-ylmethyl 7-oxabicyclo(4.1.0)heptane-3-carboxylate, p-toluenesulfonic acid reaction product 7-Oxabicyclo(4.1.0)heptane-3-carboxylic acid, 7-oxabicyclo(4.1.0)hept-3-ylmethyl ester, reaction products with p-toluenesulfonic acid 71010-85-0