7-(4-Chloro-phenyl)-2,9-dimethyl-pyrido[3',2':4,5]thieno[3,2-d][1,3]oxazin-4-one 、
C.I.酸性橙108 反应 2.0h,
以66%的产率得到6-(4-Chloro-phenyl)-3-{[N-(2-hydroxy-ethyl)-acetimidoyl]-amino}-4-methyl-thieno[2,3-b]pyridine-2-carboxylic acid; compound with 2-amino-ethanol