InChI=1/C17H18N2O2/c1-19-9-11(17(20)21-2)6-13-12-4-3-5-14-16(12)10(8-18-14)7-15(13)19/h3-6,8,11,15,18H,7,9H2,1-2H ergoline-8-carboxylic acid, 9,10-didehydro-6-methyl-, methyl ester methyl 6-methyl-9,10-didehydroergoline-8-carboxylate