Abstract
Pumilol (1), a strobane diterpenoid, reported herein for the first time was isolated from the bark of Pinus pumila (Pall.) Regel (Siberian Dwarf Pine or Japanese Stone Pine), along with seventeen known compounds including serratane triterpenoids, not previously reported from this species, and four ferulate derivatives. The stereostructure of pumilol was established using HRESIMS, NMR, the DP4+ probabilities and by comparison of the experimental and calculated electronic circular dichroim (ECD) spectra. Labda-8(17),13-dien-15-oic acid (4), bornyl trans-4-hydroxycinnamate (14) and E-bornyl ferulate (15) showed activity against S. aureus and/or E. faecalis with MIC90 values 12.5-50 µM.