[CH3:1][CH2:2][NH+:3]([CH2:6][CH2:7][N:8]1[N:20]=[C:19]2[C:10]3[C:11]([S:16][C:17]4[CH:24]=[C:23](Cl)[CH:22]=[CH:21][C:18]=42)=[C:12]([CH3:15])[CH:13]=[CH:14][C:9]1=3)[CH2:4][CH3:5].CS([O-])(=O)=O.CCN(CCN1N=C2C3C(SC4C=C(Cl)C=CC=42)=C(CO)C=CC1=3)CC.FC(F)(F)C(O)=O>O>[CH3:5][CH2:4][N:3]([CH2:6][CH2:7][N:8]1[N:20]=[C:19]2[C:10]3[C:11]([S:16][C:17]4[C:18]2=[CH:21][CH:22]=[CH:23][CH:24]=4)=[C:12]([CH3:15])[CH:13]=[CH:14][C:9]1=3)[CH2:2][CH3:1]A mixture of the compounds according to Example Ia-3 and Ia-4 (cis-trans mixture) (300 mg), trifluoroacetic acid (10 ml) and water (10 ml) is stirred at room temperature for 24 hours and concentrated. The solid residue is washed with hot cyclohexane.
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