Two new isoarylbenzofuran diglucosides from the root bark of Morus alba

Two new arylbenzofuran diglucopyranosides, (2″R)-(–)-moracin-O-5′,3″-β-d-diglucopyranoside (1) and (2″R)-(–)-moracin-P-5′,2″-β-d-diglucopyranoside (2), along with known arylbenzofurans, moracin M 6-β-d-glucopyranoside (3), and an isomeric mixture of R-(–)-moracin O (4) and R-(–)-moracin P (5), were isolated from the root bark of Morus alba L. The structure of the compounds was elucidated based on mass spectrometry, infrared, 1D and 2D nuclear magnetic resonance spectroscopic data.