Four New Bibenzyl Derivatives from Dendrobium candidum

Yan Li; Chun-Lan Wang; Ya-Jun Wang; Fang-Fei Wang; Shun-Xing Guo; Jun-Shan Yang; Pei-Gen Xiao

doi:10.1248/cpb.57.997

Notes

Four New Bibenzyl Derivatives from Dendrobium candidum

Yan Li, Chun-Lan Wang, Ya-Jun Wang, Fang-Fei Wang, Shun-Xing Guo, Jun-Shan Yang, Pei-Gen Xiao

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Keywords: Dendrobium candidum, bibenzyl derivative, dendrocandin F, dendrocandin G, dendrocandin H, dendrocandin I

JOURNAL FREE ACCESS

2009 Volume 57 Issue 9 Pages 997-999

DOI https://doi.org/10.1248/cpb.57.997

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Abstract

Four new bibenzyl derivatives, namely, dendrocandins F—I (1—4), were isolated from the stems of Dendrobium candidum. Their structures were elucidated by the analysis of spectroscopic data. Dendrocandins F and G represent the fourth and fifth example of bisbibenzyl derivates with a dibenzopyran ring between two units, respectively. Dendrocandin H represents the first example of a bibenzyl derivative formed by a bibenzyl and a 1,4-phenanthraquinone unit via a dibenzopyran ring. Compounds 1—4 were examined for antioxidant activity by 1,1-diphenyl-2-picrylhydrazyl (DPPH) free radical scavenging assay.

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