Abstract: In our previous paper[1]we have reported two new cyclopeptides，heterophyllins A and B，obtained from the roots of Pseudostellaria heterophylla(Miq.)．Pax ex Pax et Hoffm..Recently another new cyclopeptide，named heterophyllin C，has been isolated from the plant．On the basis of spectral and chemi-cal methods the structure was elucidated as cyclo-(leucyl)-glycyl-prolyl-soleucyl-isoleucyl－prolyl－isoleucyl)．

Key words: Pseudostellaria heterophylla