[CH3:1][O:2][S:3]([O-:6])(=[O:5])=[O:4].[CH3:7][N+:8]([CH3:23])([CH3:22])[CH2:9][CH2:10][N:11]([CH3:21])[C:12]1[CH:17]=[CH:16][CH:15]=[CH:14][C:13]=1[N+:18]([O-])=O>O.[Pd]>[CH3:1][O:2][S:3]([O-:6])(=[O:5])=[O:4].[NH2:18][C:13]1[CH:14]=[CH:15][CH:16]=[CH:17][C:12]=1[N:11]([CH3:21])[CH2:10][CH2:9][N+:8]([CH3:23])([CH3:22])[CH3:7]4.5 g (12.9 mmol) of the compound from Step 10.3 was dissolved in 80 mL of water and hydrogenated for 2 hours in the presence of 0.3 g of Pd/C (10%) under a hydrogen pressure of 9 bar. The catalyst was then filtered off, and the filtrate was evaporated to dryness. This gave 4.1 g (99% of the theoretical) of a violetish oil.
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