[CH3:1][C:2]([CH3:36])([CH3:35])[CH2:3][CH2:4][C@:5]1([CH3:34])[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:8]([OH:15])=[C:7]([C:16]2[NH:21][C:20]3[CH:22]=[CH:23][C:24]([NH:26][S:27]([CH3:30])(=[O:29])=[O:28])=[CH:25][C:19]=3[S:18](=[O:32])(=[O:31])[N:17]=2)[C:6]1=[O:33].[OH-].[K+:38]>C(O)C.O>[CH3:1][C:2]([CH3:36])([CH3:35])[CH2:3][CH2:4][C@:5]1([CH3:34])[C:14]2[C:9](=[CH:10][CH:11]=[CH:12][CH:13]=2)[C:8]([O-:15])=[C:7]([C:16]2[NH:21][C:20]3[CH:22]=[CH:23][C:24]([NH:26][S:27]([CH3:30])(=[O:29])=[O:28])=[CH:25][C:19]=3[S:18](=[O:32])(=[O:31])[N:17]=2)[C:6]1=[O:33].[K+:38]Placed 245.12 mg of the product of Example 49-7 into a 10 mL receiver flask. Added 6 mL of 50/50 ethanol/water. Warmed to in an oil bath on a hot-plate set to 90° C. and added 29.02 mg of potassium hydroxide. Solution clarified. Cooled in 10° C. increments to 55° C. Solid precipitated. Cooled to 40° C. and held for -1 hour. Cooled to ambient temperature and stirred overnight. Collected solid via vacuum filtration the next morning and dried the solid at 50° C./vacuum for 3 days.
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