Tetrahydrofuran → 2,3-Dimethoxy-7-[2-(2-pyridyloxy)ethyl]-4,5,6,7,8,9-hexahydro-1H-benzo[a]cycloheptene-1,4-dione

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C[O:2][C:3]1[C:8]2[CH2:9][CH2:10][CH:11]([CH2:14][CH2:15][O:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=3)[CH2:12][CH2:13][C:7]=2[C:6]([O:23]C)=[C:5]([O:25][CH3:26])[C:4]=1[O:27][CH3:28].N1C(C(O)=O)=CC=CC=1C(O)=O.C1COCC1.O=[N+]([O-])[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[O-][N+](=O)[O-].[Ce+4].[NH4+].[NH4+]>C(=O)(O)[O-].[Na+].O>[CH3:28][O:27][C:4]1[C:3](=[O:2])[C:8]2[CH2:9][CH2:10][CH:11]([CH2:14][CH2:15][O:16][C:17]3[CH:22]=[CH:21][CH:20]=[CH:19][N:18]=3)[CH2:12][CH2:13][C:7]=2[C:6](=[O:23])[C:5]=1[O:25][CH3:26]