1H-pyrrole, 1-ethenyl-2-methyl- 2-methyl-1-vinyl-1H-pyrrole InChI=1/C12H13NO2/c1-3-15-12(14)11-8(2)9-6-4-5-7-10(9)13-11/h4-7,13H,3H2,1-2H