To study the chemical constituents of Linderae Radix,three new compounds,named linderaggredin B1(1),linde-nonic acid A(2),and lindenonic acid B(3),along with one know compound chlorahupetolide K(4)were isolated from the 90%EtOH extract of Linderae Radix by various chromatographic techniques such as silica gel,ODS,Sephadex-LH 20,Pre-HPLC,their structures was elucidated by spectral data analysis.Compound 4 was isolated from Lauraceae plants for the first time.