Acetondicarbonsaeuremethylestermonoamid 、
2-Phenyl-4<2-(8-dimethylamino-5-hydroxy-thiochroman-4-on-2-yl)-ethyliden>-2-thiazolin-5-on 在
sodium hydride 作用下,
生成 7-Dimethylamino-4-thiobenzamido-3,10,12-trihydroxy-1,4,4a,5,5a,6,11,12a-oktahydro-1,11-dioxo-6-thianaphthacen-2-carboxamid