Cl[CH2:2]Cl.[CH3:4][C:5]1([CH3:27])[S:9][C@@H:8]2[C@H:10]([NH:13][C:14]([C@H:16]([NH2:23])[C:17]3[CH:18]=[CH:19][CH:20]=[CH:21][CH:22]=3)=[O:15])[C:11](=[O:12])[N:7]2[C@H:6]1[C:24]([OH:26])=[O:25].O.O.O.S([O-])([O-])(=O)=O.[Mg+2]>C(N(CC)CC)C>[CH3:4][C:5]1([CH3:27])[S:9][C@@H:8]2[C@H:10]([NH:13][C:14]([C@H:16]([NH2:23])[C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][CH:18]=3)=[O:15])[C:11](=[O:12])[N:7]2[C@H:6]1[C:24]([OH:26])=[O:25].[CH2:11]([N:7]([CH2:6][CH3:24])[CH2:8][CH3:2])[CH3:10]To 14 ml. of dichloromethane were added 806 mg. of ampicillin trihydrate, 600 mg. of magnesium sulfate, and 0.42 ml. of triethylamine and after stirring the mixture for about 1 hour at room temperature, magnesium sulfate was filtered off to provide a dichloromethane solution of ampicillin triethylamine salt.
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