[CH2:1]1[C:3]2([CH2:8][CH2:7][CH:6]([CH2:9][NH:10]C(=O)OCC3C=CC=CC=3)[CH2:5][CH2:4]2)[CH2:2]1.[ClH:21]>CO.[Pd]>[ClH:21].[CH2:2]1[C:3]2([CH2:8][CH2:7][CH:6]([CH2:9][NH2:10])[CH2:5][CH2:4]2)[CH2:1]1Compound 8-5 (2.85 g, 10.4 mmol) was dissolved in 30 mL of methanol, added 0.2 g of palladium on carbon and 1 mL of concentrated hydrochloric acid, and subjected to catalytic hydrogenation reaction overnight and filtered to remove insolubles, then concentrated to give Compound 8-6 (1.8 g, yield 98.5%).
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