Biflavonoids, Lignans, and Related Compounds from the Roots of Diplomorpha canescens

Two new biflavonoids, 14″‐O‐methyldihydrodaphnodorin B (1) and 14″‐O‐methyldaphnodorin J (2), along with 16 known compounds, i.e., dihydrodaphnodorin B (3), daphnodorin J (4), 3″‐epidihydrodaphnodorin B (5), daphnodorin B (6), neochamaejasmin B (7), sikokianin B (8), (−)‐syringaresinol (9), (−)‐syringaresinol 4‐O‐β‐D‐glucopyranoside (10), (+)‐nortrachelogenin (11), (−)‐lariciresinol (12), (−)‐pinoresinol (13), syringin (14), syringinoside (15), daphnoretin (16), phorbol 13‐acetate (17), and methyl paraben (18) were isolated from the roots of Diplomorpha canescens (Meisn.) C.A. Meyer. The structures were determined on the basis of spectroscopic data.