SCYLLO-QUERCITOL GALLATES AND HEXAHYDROXYDIPHENOATES FROM QUERCUS STENOPHYLLA

Article abstract of DOI:10.1016/S0031-9422(00)84517-3

Key Word Index - Quercus stenophylla; Fagaceae; scyllo-quercitol; gallotannin; ellagitannin; gallic acid; hexahydroxydiphenic acid.A series of gallotannins and ellagitannins based on a scyllo-quercitol core have been isolated from the bark of Quercus stenophylla.On the basis of chemical and spectroscopic evidence, the structures of the gallotannins have been established as 2-O-, 1,2-di-O-, 1,2,3-tri-O-, 1,2,3,4-tetra-O- and 1,2,3,4,5-penta-O-galloyl-scyllo-quercitols, and the ellagitannins as 1,5-di-O-galloyl-2,3-(S)-hexahydroxydiphenoyl-scyllo-quercitol and 1,4-(or 4,5)-di-O-galloyl-2,3-(S)-hexahydroxydiphenoyl-scyllo-quercitol.