3-(sec-Butylcarbamoyl)-7-oxabicyclo(2.2.1)heptane-2-carboxylic acid 7-Oxabicyclo(2.2.1)heptane-2-carboxylic acid, 3-(N-sec-butylcarbamoyl)- 73806-02-7 N-sec-Butyl-3,6-endoxohexahydro-phthalamic acid