Study on chemical constituents from green husk of Juglans sigillata / 中草药

ABSTRACT

Objective: To investigate the chemical constituents in the green husk of Juglans sigillate. Methods: The chemical constituents were isolated by silica gel, RP-18, MCI column chromatographies and so on. The structures were identified on the basis of spectroscopic analysis (MS, 13C-NMR, 1H-NMR). Results: Eleven compounds were isolated from the extract of green husk of J. sigillate. And their structures were characterized as sinapaldehyde (1), (Z)-10-eicosenoic acid (2), 5α, 8α-epidioxyergosta-6, 22E-diene-3β-ol (3), 5, 8-dihydroxy-4-methoxy-α-tetralone (4), regiolone (5), 4, 5-dihydroxy-α-tetralone (6), 4, 5, 8-trihydroxy-α-tetralone (7), 5-hydroxy-4-methoxy-α-tetralone (8), 5-hydroxy-2-methoxy-1, 4-naphthoquinone (9), naringenin (10), and β-sitosterol (11). Conclusion: Compounds 1-2 are isolated from the plants of Juglans Linn. for the first time.