1H-indole-1-carboxylic acid, 3-(cyanomethyl)-2-ethenyl-, 1,1-dimethylethyl ester InChI=1/C17H18N2O2/c1-5-14-13(10-11-18)12-8-6-7-9-15(12)19(14)16(20)21-17(2,3)4/h5-9H,1,10H2,2-4H tert-butyl 3-(cyanomethyl)-2-vinyl-1H-indole-1-carboxylate