Three new cyclic diarylheptanoids myricananins F–H 1–3, resp., along with five known ones, 4–8, were isolated from the roots of Myrica nana.Compound 3has been obtained by Nagai etal.by reduction of porson with NaBH4. In this work, compound 3was isolated from natural origin for the first time. The structures of 1–8were elucidated using spectroscopic methods.