C[O-].[Na+:3].[C:4]1([O:14][CH2:15][CH2:16][NH:17][C:18]2[CH:26]=[CH:25][C:21]([C:22]([OH:24])=[O:23])=[CH:20][CH:19]=2)[C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=[CH:6][CH:5]=1>CO>[C:4]1([O:14][CH2:15][CH2:16][NH:17][C:18]2[CH:19]=[CH:20][C:21]([C:22]([O-:24])=[O:23])=[CH:25][CH:26]=2)[C:13]2[C:8](=[CH:9][CH:10]=[CH:11][CH:12]=2)[CH:7]=[CH:6][CH:5]=1.[Na+:3]To a solution of 1.42 g. sodium methoxide in 250 ml. methanol is added 8.0 g. of 4-[2-(1-naphthyloxy)ethylamino]benzoic acid. After one-half hour, the mixture is concentrated under vacuum to a solid which is washed with methanol and then CH2Cl2. This solid is immediately dried in a vacuum oven to minimize absorption of moisture from the air.
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