C[O:2][C:3](=[O:36])[CH:4]([O:31][CH2:32][CH2:33][CH2:34][CH3:35])[CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:13][C:14]2[S:18][C:17]([C:19]3[CH:24]=[CH:23][C:22]([C:25]([F:28])([F:27])[F:26])=[CH:21][CH:20]=3)=[N:16][C:15]=2[CH3:29])=[CH:8][C:7]=1[CH3:30].[Li+].[OH-]>>[CH2:32]([O:31][CH:4]([CH2:5][C:6]1[CH:11]=[CH:10][C:9]([O:12][CH2:13][C:14]2[S:18][C:17]([C:19]3[CH:24]=[CH:23][C:22]([C:25]([F:28])([F:27])[F:26])=[CH:21][CH:20]=3)=[N:16][C:15]=2[CH3:29])=[CH:8][C:7]=1[CH3:30])[C:3]([OH:36])=[O:2])[CH2:33][CH2:34][CH3:35]In analogy to the procedure described in example 10 d], [rac]-2-butoxy-3-{2-methyl-4-[4-methyl-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-phenyl}-propionic acid methyl ester was treated with 1 N LiOH to obtain [rac]-2-butoxy-3-{2-methyl-4-[4-methyl-2-(4-trifluoromethyl-phenyl)-thiazol-5-ylmethoxy]-phenyl}-propionic acid as yellow solid.
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