3,6-diphenyl-1,6-dihydropyridazine

1-(4-methoxyphenyl)-3-phenylpropane-1,3-dione

1-(N,N-diethylamino)-1,3-butadiene

[(2-bromo-1-phenylethylidene)amino]urea

trans-1-(dimethylamino)-1,3-butadiene