4-羟基-2H-1,2-苯并噻嗪-3-羧酸甲酯1,1-二氧化物

吡罗昔康杂质 H

tert-butyl 4-hydroxy-2H-benzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide

2-methoxyethyl 4-hydroxy-2H-1,2-benzothiazine-3-carboxylate 1,1-dioxide

2-ethoxyethyl 4-hydroxy-2H-benzo[e][1,2]thiazine-3-carboxylate 1,1-dioxide