Extraction and structure elucidation of three lignans from peeled dried roots and stems of Syringa pinnatifolia Chemical constituents from Syringa pinnatifolia Clonal Structure and Genetic Diversity of Natural Syringa pinnatifolia var.alanshanica Assessed by ISSR Phytochemical and pharmacological progress on peeled stem of Syringa pinnatifolia, a Mongolian folk medicine Iridoids from stem bark of Syringa pinnatifolia