New Aurone Glucosides and New Phenylpropanoid Glucosides from Bidens pilosa

Abstract

Three new glucosides of (Z)-6,7,3′,46-tetrahydroxyaurone, (Z)-7-O-/J-D-glucopyranosyl-6,7,3′,4′-tetrahydroxyaurone, (Z>6-O-(6-f>-/M:oumaroyl-/l-D-glucopyranosyl)-6,7,3′,4′,-tetrahydroxyaurone, (Z)-6-O-(6-O-acetyl-/β-D-gluco-pyranosyl)-6,7,3′,4′-tetrahydroxyaurone, together with (Z)-6-O-O-D-glucopyranosyl-6,7,3′,4′-tetrahydroxyaurone, and two new phenylpropanoid glucosides, 4-O-(6-O-/xoumaroyl-/i-D-glucopyranosyl)-/>-couinaric acid and 4-O-(2-O-acetyl-6-O-/>-coumaroyl-#x03B2;-D-glucopyranosyl)“/β-coumaric acid, have been isolated from the fresh leaves of Bidens pilosa. These structures have been elucidated on the basis of spectral data and chemical correlation. © 1991, The Pharmaceutical Society of Japan. All rights reserved.