Succinic anhydride → 4-Oxo-4-(4-{4-[(2-phenyl-5-trifluoromethyl-oxazole-4-carbonyl)-amino]-phenyl}-piperazin-1-yl)-butyric acid

Reaction equation

Cl.[N:2]1([C:8]2[CH:13]=[CH:12][C:11]([NH:14][C:15]([C:17]3[N:18]=[C:19]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)[O:20][C:21]=3[C:22]([F:25])([F:24])[F:23])=[O:16])=[CH:10][CH:9]=2)[CH2:7][CH2:6][NH:5][CH2:4][CH2:3]1.C(N(CC)CC)C.[C:39]1(=[O:45])[O:44][C:42](=[O:43])[CH2:41][CH2:40]1>C1(C)C=CC=CC=1.CS(C)=O.C(OCC)(=O)C>[O:45]=[C:39]([N:5]1[CH2:6][CH2:7][N:2]([C:8]2[CH:13]=[CH:12][C:11]([NH:14][C:15]([C:17]3[N:18]=[C:19]([C:26]4[CH:31]=[CH:30][CH:29]=[CH:28][CH:27]=4)[O:20][C:21]=3[C:22]([F:23])([F:25])[F:24])=[O:16])=[CH:10][CH:9]=2)[CH2:3][CH2:4]1)[CH2:40][CH2:41][C:42]([OH:44])=[O:43]