Correlation between quality of Alisma orientale in Sichuan Province and rhizosphere soil physicochemical property A new triterpene in rhizome of Alisma orientale Determination of amino acids in Alisma orientale by pre-column derivatization of RP-HPLC Effects of active fraction of Alisma orientaleon osteopontin expression in renal tissue of urolithiasis model rat with calcium oxalate stone A new triterpene in rhizome of Alisma orientale Correlation between quality of Alisma orientale in Sichuan Province and rhizosphere soil physicochemical property