2,4-diphenyl-5,6,7,8-tetrahydro-1-benzopyranium perchlorate 、
{[1-Chloro-2-phenyl-eth-(E)-ylideneamino]-methylene}-dimethyl-ammonium 以58%的产率得到8-[1-[1-Chloro-2-phenyl-eth-(E)-ylideneamino]-meth-(E)-ylidene]-2,4-diphenyl-5,6,7,8-tetrahydro-chromenylium; perchlorate