Quantitative analysis of four active constituents in Tibetan herb Gymnadenia conopsea by high-performance liquid chromatography Constituents of Gymnadenia conopsea Construction of a Full-length cDNA Library of Gymnadenia conopsea by Modified Oligo-capping Uniform design for in vitro somatic embryogenesis and plant regeneration of Gymnadenia conopsea Advances in studies on chemical constituents and pharmacological activities for plants of Gymnadenia R. Br.