| 发明名称 |
PREPARATION OF ESTERS OF 2H-1,2-BENZOTHIAZINE-3-CARBOXYLIC ACID 1,1-DIOXIDE USEFUL AS INTERMEDIATES FOR PREPARING PIROXICAM AND CERTAIN NOVEL 2-(2-METHYL-3-HYDROXY-2-3-DIHYDRO-1,2-BENZISOXAZOL-3-YL)-2-HALOACETATES USED AS STARTING MATERIALS THEREFOR |
