[OH:1][C:2]1[CH:3]=[C:4]([C:10](=O)[CH3:11])[CH:5]=[CH:6][C:7]=1[O:8][CH3:9].Cl.[N+:14]([C:17]1[CH:25]=[CH:24][C:20]([CH2:21][O:22][NH2:23])=[CH:19][CH:18]=1)([O-:16])=[O:15].N1C=CC=CC=1>CCO>[N+:14]([C:17]1[CH:18]=[CH:19][C:20]([CH2:21][O:22]/[N:23]=[C:10](/[C:4]2[CH:5]=[CH:6][C:7]([O:8][CH3:9])=[C:2]([OH:1])[CH:3]=2)\[CH3:11])=[CH:24][CH:25]=1)([O-:16])=[O:15]A solution of ketone 12 (200 mg, 1.20 mmol) in EtOH (2.0 mL) was treated with compound 19 (0.27 g, 1.32 mmol) and pyridine (0.5 mL) and the resulting mixture heated at reflux for 3 h then cooled and the solvent evaporated under reduced pressure. The ensuing residue was partitioned between CH2Cl2 (10 mL) and H2O (10 mL). The separated aqueous fraction was extracted with CH2Cl2 (1×5.0 ml) and the combined organic fractions were dried (MgSO4) then filtered and concentrated under reduced pressure to give a light-yellow solid. Recrystallisation (isopropanol) of this material afforded the title compound CP30218 (340 mg, 89%) as pale-yellow crystals, m.p. 105.0-105.7° C.
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