2.2. Plant material and extracts preparation
Raw material was harvested from natural positions in the central region of Poland (near Góra Kalwaria) during the flowering season, and dried at room temperature and dropped. Herbs of both species were collected from the same region. Botanical identification was performed by Prof. B. Sudnik-Wójcikowska from the Department of Environmental Botany, Warsaw University, Poland. A specimen of the raw materials (No. 010907, 020907) is available in the drug collection of the Department of Pharmacognosy and Molecular Basis of Phytotherapy, Medical University, Warsaw, Poland.