Orthogonal optimization of extract technology for ursolic acid from Sambucus chinensis cDNA cloning,difference expression in various organs,and bioinformatic analysis of HMGS gene in Sambucus chinensis Anatomical Structure and Histochemical Localization of Chlorogenic Acid of Sambucus chinensis Lindl. Chemical constituents in Sambucus chinensis Molecular cloning, differential expression, and bioinformatics analysis of HMGR gene in Sambucus chinensis