To study the chemical constituents of Linderae Radix,three new compounds,named linderaggredin B1 (1),lindenonic 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.