Jatrogrossidion, 4Z-jatrogrossidentadion, 15-epi-4Z-jatrogrossidentadion, 4
E-jatrogrossidentadion, 15-epi-4E-jatrogrossidentadion, 2-hydroxyisojatrogr
ossidion, 2-epihydroxyisojatrogrossidion and jatrowediol have been isolated
from the stems of Jatropha weddelliana. The elucidation of the structure o
f the latter, a novel lathyrane, was accomplished by detailed NMR investiga
tion and X-ray diffraction analysis.