Bioassay-guided fractionation of the leaves of Perovskia atriplicifolia (Russian sage) resulted in the isolation of four previously known flavonoid derivatives, 5-hydroxy-6,7,3',4'-tetramethoxyflavone (1), 5,7-dihydroxy-6,3',4'-trimethoxyflavone (2), 5-hydroxy-6,7,4'-trimethoxyflavone (3), and
Essential oil (EO) composition, phenolic content, and antioxidant activity were investigated in 17 P. abrotanoides populations collected from different geographical regions in Iran. The highest (3.61%) and lowest (1.25%) essential oil yields were measured in populations from Semnan Province (PSESM2