3-Carbamoyl-7-oxabicyclo(2.2.1)heptane-2-carboxylic acid ammonia salt 7-Oxabicyclo(2.2.1)heptane-2-carboxylic acid, 3-carbamoyl-, ammonia salt 73806-03-8 Ammonium 3,6-endoxohexahydrophthalamate