CC([O:4][C@@H:5]1[C:19](=[O:20])[C@H:18]2[C@@:8]([CH3:27])([CH2:9][CH2:10][C@@H:11]3[C@:17]2([CH3:21])[CH2:16][C@@H:15]([C:22]2[CH:23]=[CH:24][O:25][CH:26]=2)[O:14][C:12]3=[O:13])[C@H:7]([C:28]([O:30][CH3:31])=[O:29])[CH2:6]1)=O.C(=O)([O-])[O-].[Na+].[Na+].O>CO>[CH3:27][C@:8]12[C@H:7]([C:28]([O:30][CH3:31])=[O:29])[CH2:6][C@H:5]([OH:4])[C:19](=[O:20])[C@@H:18]1[C@:17]1([CH3:21])[C@H:11]([C:12]([O:14][C@H:15]([C:22]3[CH:23]=[CH:24][O:25][CH:26]=3)[CH2:16]1)=[O:13])[CH2:10][CH2:9]2To a solution of Salvinorin A (500 mg, 1.15 mM) in methanol (10 ml) was added solid sodium carbonate (490 mg, 4.6 mM) and the mixture stirred at room temperature overnight. Water (20 ml) was added to mixture and the mixture stirred for 30 mins. The solution was filtered and the filter-cake washed with ice-cold water (20 ml) and ice-cold methanol (20 ml) and dried in a dessicator to give Salvinorin B (191 mg, 42%).
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