NEOCLERODANE DITERPENOIDS FROM AERIAL PARTS OF LINARIA-SAXATILIS VAR GLUTINOSA

From the less polar fractions of the aerial parts of L. saxatilis var. glutinosa, one new neo-clerodane diterpenoid, highly oxygenated at the side chain, was isolated in addition to several known compounds. The structure of the new compound was established by a combination of H-1 and C-13 NMR spectral data analysis, while the assignment of the absol ute stereochemistry of the side chain was performed by X-ray crystallo graphic analysis. Varied spectroscopic studies and several chemical co rrelations were used to confirm the structures of the remaining compou nds.