Ent-Labdane Diterpenoids from the Aerial Parts of Eupatorium obtusissmum
Six new ent-labdane diterpenoids, uasdlabdanes A-F (1-6), were isolated from the aerial parts of Eupatorium obtusissmum. The new structures were elucidated through spectroscopic and spectrometric data analyses. The absolute configurations of compounds 1 and 2 were established by X-ray crystallography, and those of 3-6, by comparison of experimental and calculated electronic circular dichroism spectra. The antiproliferative activity of the compounds was studied in a panel of six representative human solid tumor cell lines and showed GI50 values ranging from 19 to >100 μM. © 2016 The American Chemical Society and American Society of Pharmacognosy.
Castillo, Q. A.,
Eiroa, J. L.,
Padrón, J. M.,
Báez, L. A.,
Germosén, E. A.
Ent-Labdane Diterpenoids from the Aerial Parts of Eupatorium obtusissmum.
Journal of Natural Products, 79(4),