1H-indene-2-carboxylic acid, 2,3-dihydro-4-methyl-1-oxo-, methyl ester InChI=1/C12H12O3/c1-7-4-3-5-8-9(7)6-10(11(8)13)12(14)15-2/h3-5,10H,6H2,1-2H methyl 4-methyl-1-oxoindane-2-carboxylate