InChI=1/C9H10O2/c1-11-9(10)8-5-6-2-3-7(8)4-6/h2-3,5-7H,4H2,1H bicyclo[2.2.1]hepta-2,5-diene-2-carboxylic acid, methyl ester methyl bicyclo[2.2.1]hepta-2,5-diene-2-carboxylate