Natural and unnatural anthraquinones isolated from the ethanol extract of the roots of Knoxia valerianoides

• Main Authors: Feng Zhao (Author), Sujuan Wang (Author), Sheng Lin (Author), Chenggen Zhu (Author), Zhenggang Yue (Author), Yang Yu (Author), Bo Liu (Author), Xiuli Wu (Author), Yongchun Yang (Author), Yan Li (Author), Jiangong Shi (Author)
• Format: Book
• Published: Elsevier, 2012-06-01T00:00:00Z.
• Subjects: article
• Online Access: Connect to this object online.

Eight new 9,10-anthraquinones (1-8) including three acetonide derivatives of 3-hydroxy-2-hydroxymethyl-9,10-anthraquinones (6-8) were isolated from an ethanol extract of the roots of Knoxia valerianoides. On the basis of chemical transformation reactions of the co-occurring 14 and 15 combined with H...