| This research paper presents findings of an investigation about antibacterial effect of
methanol/water fractions as well as cytotoxic activity of the extracts obtained from Pedicularis
wilhelmsiana (Scrophulariaceae) which grows in Azarbaijan/Iran by agar well diffusion
method and brine shrimp lethality test successively. Phytochemical study of this plant was
determined as well. A combination of solid-phase extraction (SPE), preparative reversed-phase
HPLC analysis and spectroscopic means were applied for fractionation, purification, and
identification of ingredients respectively. Antimicrobial test demonstrated that 40% and 60%
methanol/water fractions were more active than methanolic extract and other SPE fractions.
No cytotoxic effect was detected from the extracts of this plant by brine shrimp lethality
assay. Phytochemical study of aerial parts of Pedicularis wilhelmsiana (P. wilhelmsiana)
afforded two phenylethanoids (verbascoside and martynoside), three iridoids (Aucubin,
ipolamiid, 5-hydroxy-8-epi-loganin) and two flavonoids (luteolin, luteolin-7-glucoside) along
with mannitol on the basis of spectral evidences (UV, 1H and 13CNMR) as well as comparison
with literature data. The findings of this research supported further studies related to antibiotic
potential of methanolic extract of P. wilhelmsiana. |