[O:1]=[S:2]1(=[O:17])[N:7]=[CH:6][C:5]2[CH:8]=[C:9](C(C)(C)C)[CH:10]=[C:11](Cl)[C:4]=2[O:3]1.O=S1(=O)N=CC2C=CC=CC=2O1>>[O:17]=[S:2]1(=[O:1])[NH:7][CH2:6][C:5]2[CH:8]=[CH:9][CH:10]=[CH:11][C:4]=2[O:3]1This compound is prepared by essentially the same method as described in Example 9 except that the 2,2-dioxo-6-(1,1-dimethylethyl)-8-chloro-1,2,3-benzoxathiazine is replaced by 2,2-dioxo-1,2,3-benzoxathiazine. The following reagents are employed:
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