Ontology highlight
ABSTRACT:
SUBMITTER: Li LB
PROVIDER: S-EPMC6413031 | biostudies-literature | 2019 Feb
REPOSITORIES: biostudies-literature
Li Liang-Bo LB Xiao Guang-Da GD Xiang Wei W Yang Xing X Cao Ke-Xin KX Huang Rong-Shao RS
Molecules (Basel, Switzerland) 20190222 4
Three new substituted bithiophenes (<b>1</b>⁻<b>3</b>), and one new sulf-polyacetylene ester, ritroyne A (<b>16</b>) were isolated from the whole plant of <i>Echinops ritro</i> together with twelve known substituted thiophenes. The structures were elucidated on the basis of extensive spectroscopic analysis including 1D and 2D NMR as well as MS. Furthermore, the absolute configuration of ritroyne A (<b>16</b>) was established by computational methods. In bioscreening experiments, four compounds ( ...[more]