[OH:1][C:2]1[C:14]([CH2:15][CH:16]=[CH2:17])=[C:13]([OH:18])[CH:12]=[CH:11][C:3]=1[C:4]([N:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1)=[O:5]>C(O)C.[Pd]>[OH:1][C:2]1[C:14]([CH2:15][CH2:16][CH3:17])=[C:13]([OH:18])[CH:12]=[CH:11][C:3]=1[C:4]([N:6]1[CH2:10][CH2:9][CH2:8][CH2:7]1)=[O:5]1-[2,4-dihydroxy-3-(2-propenyl)benzoyl]pyrrolidine (750 mg) in 2 ml ethanol was hydrogenated at room temperature and 5 psi for three hours using 4% Pd/C as catalyst. The solvent was removed under vacuum and the residue was chromatographed on silica gel using 50/50 ethyl acetate/hexane as eluant to give the product (650 mg).
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