Mechanism of flavonoids from Galium verum on cell proliferation and apoptosis of HepG2 Phenolic compounds from Galium aparine var.tenerum Materials for Chinese Galium L. (Rubiaceae) The resistance to tribenuron-methyl in Galium aparine in winter wheat fields in northern China Analysis of allelochemicals and allelopathic effects of Lolium multiflorum roots on weeds Chemical constituents of Galium verum Effects of Water Extract of Two Weeds on Seed Germination and Seedling Growth of Different Wheat Varieties