J Asian Nat Prod Res. 2003 Mar; 5(1): 57-61.

A new biologically active flavone glycoside from the seeds of Cassia fistula (Linn.).

Yadava RN, Verma V.

Department of Chemistry, Natural Products Laboratory, Dr H.S. Gour University Sagar Sagar, Madhya Pradesh 470003, India. rnyadava@rediffmail.com

A new bioactive flavone glycoside 1 [mp 252-254 degrees C, C28H32O16, [M]+ 624 (EIMS)] was isolated from the acetone soluble fraction of the defatted seeds of Cassia fistula (Linn.). It was characterized as a new bioactive flavone glycoside 5,3',4'-tri-hydroxy-6-methoxy-7-O-alpha-L-rhamnopyranosyl-(1 --> 2)-O-beta-D-galactopyranoside by several colour reactions, spectral analysis and chemical degradations. Compound 1 showed anti-microbial activity.