Studies on Constituents of Silybum marianum (L.) GAERTN. I. New Flavonolignans named 2, 3-Dehydrosilymarin and 2, 3-Dehydrosilychristin

Abstract

Two new flavonolignans, named 2, 3-dehydrosilymarin (I) and 2, 3-dehydrosilychristin (IIa), were isolated from the seeds of Silybum marianum (L.) GAERTN. (Compositae), together with silymarin and silychristin. Structures of these substances were determined from spectroscopic evidence.