5-[(3-ethyl-3H-benzoxazol-2-yliden)-ethylidene]-1,3-dimethyl-2-thioxo-imidazolidin-4-one 、 2.3-Dimethyl-4.5-dihydro-thiazolium-(toluol-4-sulfonat) 在
硫酸二甲酯 、 potassium iodide 作用下,
生成 {4-[(3-ethyl-3
H-benzoxazol-2-yliden)-ethylidene]-1,3-dimethyl-5-oxo-4,5-dihydro-1(3)
H-imidazol-2-yl}-(3-methyl-4,5-dihydro-thiazol-2-yl)-methinium ; iodide