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Studies on Triterpenoid Constituents of Qiaocha (Catha exulis) Research of extracting and purifying taxol from the branches of Taxus media Effect of pressure in supercritical state on extraction and crystallization of andrographolide Inclusion technology of zanthoxylum seed oil by β-cyclodextrin Study on active components of antioxidant from Rosmarinus officinalis by supercritical CO2 fluid extraction Total alkaloid extract from Macleaya cordata using supercritical CO2 fluid extraction