2,4-diphenyl-5,6,7,8-tetrahydro-1-benzopyranium perchlorate 、
[2-Chloro-3-(dimethylaminomethylidene)cyclopenten-1-yl]methylidene-dimethylazanium;chloride 生成 8-[(E)-[2-chloro-3-[(E)-(2,4-diphenyl-6,7-dihydro-5H-chromen-1-ium-8-ylidene)methyl]cyclopent-2-en-1-ylidene]methyl]-2,4-diphenyl-6,7-dihydro-5H-chromene;perchlorate