Two new flavanone glycosides from Macrothelypteris torresiana (Gaud.) Ching

Two new flavanone glycosides 1 and 2 were isolated from the aerial parts of Macrothelypteris torresiana (Gaud.) Ching. The structures of two products were identified as (2S)-5,7,2',5'-tetrahydroxyflavanone-2'-O-beta-D-6 ''-O-acetylglucopyranoside and (2S)-5,7,2',5'-tetrahydroxyflavanone-2'-O-beta-D-glucopyranoside on the basis of their chemical and spectral analysis, respectively. (C) 2009 Jin Lan Ruan. Published by Elsevier B.V. on behalf of Chinese Chemical Society. All rights reserved.