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The contents of four iridoids ( loganic acid, swertiamarin, gentiopicroside, sweroside) in Gentiana tizuensis Franch. and Gentiana farreri were analyzed by HPLC. The analysis was performed on Econosphere C18 (250 x 4.6 mm, 5 ┬Ám) column, with the solution of 0.5 % acetic acid and methanol as mobile phase, at a flow rate of 1.0 mL/min. The detection wavelength was 254 nm. The results indicated that swertiamarin was not detected in Gentiana tizuensis Franch., and the contents of four iridoids in these two plants were different.