pinifolic acid/pinus

Several experiments were conducted to determine whether the ingestion of diterpenoids (resin acids) by pine sawfly larvae influences the survival of postlarval stages. Larvae of two diprionid sawfly species were reared on shoots of two Scots pine clones, one with a low (1.5% dry wt) concentration of

OBJECTIVE To research the constituents in needles of Pinus sylvestris. METHODS Repeated column chromatography and preparation HPLC are used for compound isolation, and their structures were elucidated on the basis of spectral data analysis. RESULTS Six compounds, pinifolic acid (1), 15-oxo-8 (17)

A new labdanic norditerpene and six known labdanic diterpenes were isolated from the petroleum ether extract of the needles of Pinus sylvestris. By spectroscopic methods, the isolated compounds were determined as 15-norpinifolic acid (1), pinifolic acid (2), 4-eplimbricataloic acid (3), monomethyl