InChI=1/C12H12N4O2/c1-11(2,4-10(17)18-3)12(7-15,8-16)9(5-13)6-14/h9H,4H2,1-3H methyl 4,4,5,5-tetracyano-3,3-dimethylpentanoate pentanoic acid, 4,4,5,5-tetracyano-3,3-dimethyl-, methyl ester