[NH2:1][S:2]([C:5]1[CH:10]=[CH:9][CH:8]=CC=1CC(OCC)=O)(=[O:4])=[O:3].C([N:21]=[C:22]=[O:23])CCC>>[CH2:5]([S:2]([NH:1][C:22]([NH2:21])=[O:23])(=[O:3])=[O:4])[CH2:10][CH2:9][CH3:8]Following the procedure of Example 1, ethyl o-aminosulfonylbenzeneacetate was reacted with n-butyl isocyanate to form the N-(n-butyl)sulfonylurea derivative; m.p. 140°-142°.
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