2-苯胺基-3-羟基-4-(苯基亚胺)-2-环丁烯-1-酮 、
cis-3,5-dimethyl-1-propylpiperazine 反应 0.17h,
以to give 1-[2-hydroxy-3-(cis-2,6-dimethyl-4-propyl-1-piperazinyl)-4-oxo-2-cyclobuten-1-ylidene]-cis-2,6-dimethyl-4-propylpiperazinium hydroxide inner salt melting at about 218°-227° C的产率得到1-[2-hydroxy-3-(cis-2,6-dimethyl-4-propyl-1-piperazinyl)-4-oxo-2-cyclobuten-1-ylidene]-cis-2,6-dimethyl-4-propylpiperazinium hydroxide