[CH2:1]([C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[CH:14]=[CH:13][C:12]([C:15](O)=O)=[CH:11][C:10]=1[CH2:18][O:19][CH3:20])[CH3:2].[NH2:21][C:22](=[N:42][OH:43])[C:23]1[CH:32]=[C:31]2[C:26]([CH2:27][CH2:28][N:29]([CH2:33][CH2:34][C:35]([O:37][C:38]([CH3:41])([CH3:40])[CH3:39])=[O:36])[CH2:30]2)=[CH:25][CH:24]=1>CCOC(C)=O>[CH2:1]([C:3]1[CH:8]=[CH:7][CH:6]=[CH:5][C:4]=1[C:9]1[CH:14]=[CH:13][C:12]([C:15]2[O:43][N:42]=[C:22]([C:23]3[CH:32]=[C:31]4[C:26]([CH2:27][CH2:28][N:29]([CH2:33][CH2:34][C:35]([O:37][C:38]([CH3:39])([CH3:40])[CH3:41])=[O:36])[CH2:30]4)=[CH:25][CH:24]=3)[N:21]=2)=[CH:11][C:10]=1[CH2:18][O:19][CH3:20])[CH3:2]Title compound was prepared following general procedure 2 starting from Intermediate 23 (162 mg; 0.6 mmol) and Intermediate 25 (182 mg; 0.6 mmol). The reaction mixture was diluted with EtOAc, washed with water and brine and evaporated under vacuum. Purification by silica column chromatography (c-Hex/(DCM/EtOAc 1:1), 90/10 to 50/50) afforded the title compound as a yellowish oil. LC/MS (method B): 555.5 (M+H)+. HPLC (Method A) Rt 4.98 min.
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