Four new bibenzyl derivatives from Dendrobium candidum.
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.
Li
Yan
Y
Institute of Medicinal Plant Development, Chinese Academy of Medical Sciences and Peking Union Medical College, China.
Wang
Chun-Lan
CL
Wang
Ya-Jun
YJ
Wang
Fang-Fei
FF
Guo
Shun-Xing
SX
Yang
Jun-Shan
JS
Xiao
Pei-Gen
PG
D001632:Bibenzyls / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D002942:Circular Dichroism; D031667:Dendrobium / Q000737:chemistry*; D016166:Free Radical Scavengers / Q000737:chemistry* / Q000302:isolation & purification / Q000494:pharmacology; D009682:Magnetic Resonance Spectroscopy; D018547:Plant Stems / Q000737:chemistry
D001632:Bibenzyls; D016166:Free Radical Scavengers