Plant material

The roots of S. tebesana were obtained from Tabas, South Khorasan, Iran, during the flowering stage, in April 2020. The plant was characterized by M.R. Joharchi and a specimen of this plant was deposited in the Herbarium of the School of Pharmacy, Mashhad University of Medical Sciences, under Voucher No. 24864. The roots were dried in shade at room temperature and powdered using a grinder. The dried roots were extracted three times with EtOH 70% (each 24 h) at room temperature. After extraction, the solvent was filtered and removed by a rotatory flash evaporator. The obtained crude extract was stored at -20 °C.