C[O:2][C:3]([N:5]([C:16]1[CH:21]=[CH:20][C:19]([S:22](=[O:25])(=[O:24])[NH2:23])=[CH:18][CH:17]=1)[CH2:6][C:7]([NH:9][CH:10]1[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]1)=[O:8])=O.Cl>[OH-].[K+]>[S:22]([C:19]1[CH:20]=[CH:21][C:16]([N:5]2[CH2:6][C:7](=[O:8])[N:9]([CH:10]3[CH2:15][CH2:14][CH2:13][CH2:12][CH2:11]3)[C:3]2=[O:2])=[CH:17][CH:18]=1)(=[O:25])(=[O:24])[NH2:23]2-(N-Methoxycarbonyl-4-sulphamoylphenylamino)-N-cyclohexylacetamide (3.7 g) was dissolved in hot conc. KOH (15.0 ml). The solution was cooled and acidified with conc. HCl. The mixture was heated for 30 min. on a water bath and then filtered to yield 2.5 g product, m.p. 237° - 238°C (ethanol/water
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