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Synthesis, Crystal Structure and Spectroscopic Properties of 1,2-Benzothiazine Derivatives:An Experi
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1,2-Benzothiazine derivatives methyl 3-methoxy-4-oxo-3,4-dihydro-2H-benzo[e] [1,2]thiazine-3-carboxylate 1,1-dioxide(1) ......