Five new glycosides from the culms of Phyllostachys nigra var. henonis

Abstract

Five new glycosides, namely methyl 3-methoxybenzoate-4,5-di-O-β-D-glucopyranoside (1), (1aS,3aS,3R)-3-(4’-O-β-D-glucopyranosyl-3’-methoxyphenyl)-5,6-dioxa-bicyclo[3.3.0]octane-1-one (2), quinolin-4(1H)-one-3-O-β-D-glucopyranoside (3), 3-methoxy-propiophenone 4-O-(6’-β-D-xylopyranosyl)-β-D-glucopyranoside (4), methyl 3-methoxybenzoate 4-O-(6’-β-D-xylopyranosyl)-β-D-glucopyranoside (5), and one known compound, bambulignan B (6) were isolated from the culms of Phyllostachys nigra var. henonis. Their structures were determined using spectroscopic analysis. All compounds were evaluated for their DPPH radical scavenging activity. Compound 6 exhibited antioxidant activity with IC₅₀ value of 59.5 μM (positive control, L-ascorbic acid, IC₅₀ = 12.4 μM; 2,6-ditertbutyl-4-methyl phenol, IC₅₀ = 11.8 μM).

Keywords:

• Poaceae
• Phyllostachys nigra var. henonis
• glycosides
• culm
• antioxidant

Acknowledgements

We are grateful to Dr. Shuai Liu (State Key Laboratory of Tree Genetics and Breeding, Chinese Academy of Forestry, Beijing), Dr. Bei-Bei Yang, Dr. Xiu-Rong Bai (Institute of Materia Medica, Chinese Academy of Medical Sciences & Peking Union Medical College, Beijing), Dr. Fang Lu (State Forestry Administration Key Open Laboratory, International Centre for Bamboo and Rattan, Beijing) for their technical assistance of measuring the spectroscopic data. We are particularly grateful to Dr. Lin Yu (Jiangxi Academy of Forestry, Nanchang) for his technical assistance of collecting and identifying the precious sample.

Disclosure statement

No potential conflict of interest was reported by the authors.

Additional information

Funding

This work was financially supported by the Basic Science Research Fund Program of the International Centre for Bamboo and Rattan (ICBR) [grant number 1632021004].