2-cyclopenta-2,4-dien-1-ylidene-1,3-dimethylimidazolidine InChI=1/C10H14N2/c1-11-7-8-12(2)10(11)9-5-3-4-6-9/h3-6H,7-8H2,1-2H imidazolidine, 2-(2,4-cyclopentadien-1-ylidene)-1,3-dimethyl-