Tp. Kukina et al., Triterpenoids from Abies species - 23. A lanostane analog of cytotoxic cycloartanolide and other lactones from needle-free shoots of Siberian fir, RUSS CHEM B, 47(10), 1998, pp. 2009-2011
Two new lanostane lactones were isolated from a neutral part of an ethereal
extract of dried needle-free shoots of Siberian fir. Their structures were
proposed based on comparison of their C-13 and H-1 NMR spectra with the sp
ectra of known triterpenoid lactones with similar structures.