Research progress on chemical constituents and medical functions in plants of Bletilla Rchb. f. Advances in studies on chemical constitutents from plants of Dendrobium Sw. Phenanthrenes from aerial part of Juncus setchuensis with anxiolyticactivity Rapid recognition and identification of phenanthrenes in Juncus effusus and Juncus setchuensis by LC-ESI-MS