Sl. Mackinnon et al., SPIROCARACOLITONE ISOLATED FROM A NEW GENUS AND SPECIES, RUPTILIOCARPON CARACOLITO - THE FIRST CD SPIRO-TRITERPENOID, Tetrahedron letters, 35(9), 1994, pp. 1385-1388
The novel spiro-triterpenoid spirocaracolitone, was isolated from a ne
wly described genus and species, Ruptiliocarpon caracolito Hammel and
Zamora (Lepidobotryaceae), a tree from humid lowland tropical rainfore
st in Costa Rica. Spectroscopic methods allowed for the elucidation of
fragments of the molecule but only X-ray diffraction yielded the defi
nitive structure. Spirocaracolitone has a unique, previously unreporte
d CD spiro friedelin skeleton.