New Vernolepin Derivatives from Vernonia glabra and Glaucolides from Vernonia scorpioides.
The aerial parts of VERNONIA GLABRA afforded in addition to vernolepin, vernodalin and vernomenin, four further sesquiterpene lactones derived from vernolepin ( 1), two germacranolides and together with vernodalol the corresponding lactone 9. From VERNONIA SCORPIOIDES two further glaucolides ( 14) and ( 15) were isolated. The structure of the tiglate ( 16) is revised. The structure were elucidated by spectroscopic methods.
Jakupovic
J
J
Institute for Organic Chemistry, Technical University of Berlin, Straße des 17. Juni 135, D-1000 Berlin 12.
Baruah
R N
RN
Thi
T V
TV
Bohlmann
F
F
Msonthi
J D
JD
Schmeda-Hirschmann
G
G