New oleanane-type triterpenoid saponins isolated from the seeds of Celosia argentea
2014
Pang, Xu | Yan, Hai-Xia | Wang, Zhen-Fang | Fan, Miao-Xuan | Zhao, Yang | Fu, Xin-Tong | Xiong, Cheng-Qi | Zhang, Jie | Ma, Bai-Ping | Guo, Hong-Zhu
Three new oleanane-type triterpenoid saponins named celosins H (1), I (2), and J (3) were isolated from the seeds of Celosia argentea L. Their structures were characterized as 3- O -β- d -xylopyranosyl-(1 → 3)-β- d -glucuronopyranosyl-polygalagenin 28- O -β- d -glucopyranosyl ester, 3- O -β- d -glucuronopyranosyl-medicagenic acid 28- O -β- d -xylcopyranosyl-(1 → 4)-α- l -rhamnopyranosyl-(1 → 2)-β- d -fucopyranosyl ester, and 3- O -β- d -glucuronopyranosyl-medicagenic acid 28- O -α- l -arabinopyranosyl-(1 → 3)-[β- d -xylcopyranosyl-(1 → 4)]-α- l -rhamnopyranosyl-(1 → 2)-β- d -fucopyranosyl ester by NMR, MS, and chemical evidences, respectively. In our opinion, celosins H–J could be used as chemical markers for the quality control of C. argentea seeds.
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