Triterpenoids from Abies species VII. New lanostane lactones from Siberian fir needles

Two new lanostane lactones have been isolated from the neutral fraction of an ethereal extract of Siberian fir needles by chromatography, and their structures have been established on the basis of their spectral characteristics and chemical transformations.Novosibirsk Institute of Organic Chemistry, Siberian Branch, USSR Academy of Sciences. S. M. Kirov Leningrad Academy of Wood Technology. Translated from Khimiya Prirodnykh Soedinenii, No. 2, pp. 207–212, March–April, 1989.