1,1,3,3-tetramethylisoindoline-5-carboxylic acid 1H-isoindole-5-carboxylic acid, 2,3-dihydro-1,1,3,3-tetramethyl- InChI=1/C13H17NO2/c1-12(2)9-6-5-8(11(15)16)7-10(9)13(3,4)14-12/h5-7,14H,1-4H3,(H,15,16