A PYRANO CHALCONE AND A FLAVANONE FROM NEORAPUTIA-MAGNIFICA

The hexane extract from the stems of N. magnifica var. magnifica, affo rded two new flavonoids: 2'-hydroxy-3,4,4',5-tetramethoxy-5',6'-(2 '', 2 ''-dimethylpyran)chalcone and 5,6,7,3',4',5'-hexamethoxyflavanone wh ich were identified on the basis of spectroscopic methods. The known f lavonoids 2'-hydroxy-3,4,4',5,6'-pentamethoxychalcone, 5,7,3',4',5'-pe ntamethoxyflavanone and 5,6,7,3',4',5'-hexamethoxyflavone, the sterols sitosterol and stigmasterol were also identified. These results do no t seem to support the affiliation of Neoraputia to the tribe Cuspariea e. (C) 1997 Elsevier Science Ltd. All rights reserved.