1-benzyl-3-carbethoxy-5-methyl-7-phenyl-1,4-dihydro-4-oxopyrrolo<3,4-b>pyridine
ethyl iodide
2-phenyl-3-amino-4-t-butoxycarbonyl-5-methylpyrrole hydrochloride
2-phenyl-3-amino-5-methylpyrrole hydrochloride
N-<2-phenyl-5-methylpyrrol-3-yl>aminomethylenemalonic acid, diethyl ester