C[O:2][C:3](=[O:39])[CH2:4][CH2:5][NH:6][C:7](=[O:38])[C:8]1[CH:13]=[CH:12][C:11]([O:14][CH:15]([C:22]2[CH:27]=[CH:26][C:25]([C:28]3[CH:33]=[CH:32][C:31]([CH:34]([CH3:36])[CH3:35])=[CH:30][CH:29]=3)=[C:24]([CH3:37])[CH:23]=2)[CH2:16][CH2:17][CH2:18][CH:19]([CH3:21])[CH3:20])=[CH:10][CH:9]=1.[OH-].[Na+].Cl>C1COCC1>[CH:34]([C:31]1[CH:30]=[CH:29][C:28]([C:25]2[CH:26]=[CH:27][C:22]([CH:15]([O:14][C:11]3[CH:10]=[CH:9][C:8]([C:7]([NH:6][CH2:5][CH2:4][C:3]([OH:39])=[O:2])=[O:38])=[CH:13][CH:12]=3)[CH2:16][CH2:17][CH2:18][CH:19]([CH3:21])[CH3:20])=[CH:23][C:24]=2[CH3:37])=[CH:33][CH:32]=1)([CH3:35])[CH3:36]3-{4-[1-(4′-Isopropyl-2-methyl-biphenyl-4-yl)-5-methyl-hexyloxy]-benzoylamino}-propionic acid methyl ester (50 mg) was taken into THF (1.0 mL) and treated with NaOH (1.0 mL, 5.0 N), then refluxed under nitrogen. The reaction mixture was neutralized with HCl (1.0 mL, 5.0 N), extracted with ethyl ether, dried over sodium sulfate. Concentration gave the title compound. MS (ES): 516.7 [M+H]+, the structure was also confirmed by proton NMR.
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