[N+:1]([O-])([OH:3])=[O:2].[CH2:5]([O:12][C:13]1[CH:18]=[C:17](/[CH:19]=[CH:20]/[N+:21]([O-:23])=[O:22])[CH:16]=[CH:15][C:14]=1[O:24][CH2:25][CH2:26][O:27][CH2:28][CH3:29])[C:6]1[CH:11]=[CH:10][CH:9]=[CH:8][CH:7]=1>C(O)(=O)C>[CH2:5]([O:12][C:13]1[CH:18]=[C:17](/[CH:19]=[CH:20]/[N+:21]([O-:23])=[O:22])[C:16]([N+:1]([O-:3])=[O:2])=[CH:15][C:14]=1[O:24][CH2:25][CH2:26][O:27][CH2:28][CH3:29])[C:6]1[CH:7]=[CH:8][CH:9]=[CH:10][CH:11]=169% Nitric acid (11 mL, 171 mmol) was added to a solution of (E)-2-(benzyloxy)-1-(2-ethoxyethoxy)-4-(2-nitrovinyl)benzene described in Production Example 24-3 (15.4 g, 44.9 mmol) and acetic acid (100 mL) at 25° C., and the mixture was stirred for 6 hours. The reaction liquid was poured onto ice. The suspension was subjected to suction filtration and the product was washed with water to quantitatively obtain the title compound.
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