ANTIOXIDANT ACTIVITY OF NEW POTENTIAL ALLELOCHEMICAL FROM STEMS OF CASSIA SIAMEA LAM.Abstract
A new potential allelochemical (A) m.f. C34H42O19, m.p 168-170 ◦C, [M]+ 754 (FABMS) along with two known compounds Scutellarin 7-O-β-D-glucopyranoside (B), Luteolin (C) were isolated from methanolic extract of the stems of Cassia Siamea Lam. The structure of a new allelochemical (A) was characterized as 3,7-dihydroxy-5,3′,4′-trimethoxyflavone-3-O-β-D-xylopyranosyl-7-O-α-L-rhamnopyranosyl(1→4)-O-α-L-arabinopyranoside, on the basis of extensive spectroscopic analysis, colour reactions and various chemical degradations. Compound A exhibited higher radical scavenging activity in the (DPPH) (1,1-diphenyl-2-picrylhydrazyl) assay system.
Archana Chakravarty and R. N. Yadava*
Natural Products Laboratory, Department of Chemistry, Dr. H. S. Gour Central University, Sagar, (M.P.) India
11 April, 2015
21 May, 2015
29 July, 2015
01 October, 2015