Determination of six triterpene acid contents in effective fraction of Eriobotryae Folium by quantitative analysis of multi-components by single-marker Studies on Chemical Constituents in Fruit of Eucalyptus globulus Determination of triterpenoid acids in leaves of Eriobotrya japonica collected at in different seasons Chemical constituents from leaves of Acanthopanax evodiaefolius Determination of five triterpenic acids from Salvia chinensis of different parts by RP-HPLC-PDA Chemical constituents from Dracocephalum heterophyllum Analysis and Evaluation of Triterpenoids in Loquat Flowers