4-(2,3-dimethylindol-5-yloxy)-7-hydroxy-6-methoxyquinazoline 、
3-ethanesulfonyl-propan-1-ol 以to give 4-(2,3-dimethylindol-5-yloxy)-7-(3-ethylsulphonylpropoxy)-6-methoxyquinazoline (96 mg, 57%)的产率得到4-(2,3-Dimethylindol-5-yloxy)-7-(3-ethylsulphonylpropoxy)-6-methoxyquinazoline