[CH3:1][C:2]1(C)[O:7][C:6]2[CH:8]=[CH:9][C:10]([C@@H:12]([OH:36])[CH2:13][NH:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][O:21][CH2:22][CH2:23][CH2:24][CH2:25][C:26]3[CH:27]=[C:28]([S:32]([NH2:35])(=[O:34])=[O:33])[CH:29]=[CH:30][CH:31]=3)=[CH:11][C:5]=2[CH2:4][O:3]1.C(O)(=O)C>O>[C:2]([OH:7])(=[O:3])[CH3:1].[OH:36][C@H:12]([C:10]1[CH:9]=[CH:8][C:6]([OH:7])=[C:5]([CH2:4][OH:3])[CH:11]=1)[CH2:13][NH:14][CH2:15][CH2:16][CH2:17][CH2:18][CH2:19][CH2:20][O:21][CH2:22][CH2:23][CH2:24][CH2:25][C:26]1[CH:27]=[C:28]([S:32]([NH2:35])(=[O:34])=[O:33])[CH:29]=[CH:30][CH:31]=13-{4-[(6-{[(2R)-2-(2,2-dimethyl-4H-1,3-benzodioxin-6-yl)-2-hydroxyethyl]amino}hexyl)oxy]butyl}benzenesulfonamide (0.283 g) was stirred with acetic acid (8 ml) and water (4 ml) at 70° for 35 min before evaporating to dryness. The residue was re-evaporated twice with toluene to give the title compound (0.318 g) LCMS RT=2.34 min. ES+ve 495 (MH)+.
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