Chemical constituents from stems of Pleioblastus amarus / 中草药

ABSTRACT

Objective: To study the chemical constituents from the stems of Pleioblastus amarus. Methods: The compounds were isolated and purified by means of chromatographic techniques and their structures were identified on the basis of spectral data. Results: Fifteen known phenolic compounds were isolated in the methanol extract from the dry stems of P. amarus and thire structures were identified as tricin (1), apigenin (2), 5, 7, 2′, 4′, 6′-pentamethoxyflavone (3), 5, 7-dihydroxy-3′, 4′, 5′-trimethoxyflavone (4), acacetin (5), luteolin (6), cirsimaritin (7), p-hydroxybenzaldehyde (8), 2-hydroxybenzoic acid (9), trans-p-hydroxycoumaric acid (10), 2, 4-dihydroxybenzaldehyde (11), gallic acid (12), methyl gallate (13), questin (14), and isorhodoptilometrin (15). Conclusion: Compounds 2-7 and 10-13 are first obtained from this plant; Compounds 14 and 15 are first isolated from the plants of Pleioblastus Nakai.