Eucalyptus urograndis leaves are cheap and fine natural resources. Therefore, GC/MS was used to analyze high-grade bioenergy utilization of acetone extractives of Eucalyptus urograndis leaves. 43 compounds in the extractives were identified. The mainly abundant constituents were 1,2,3-butanetriol (33.25%), ethyl .alpha.-d-glucopyranoside (13.48%), thiazolidin-4-one, 3-(9H-xanthen-9-yl)-2-thioxo- (12.31%), 3,6,9,12-tetraoxatetradecan-1-ol,14-[4- (1,1,3,3-tetramethylbutyl) phenoxy]- (5.23%), 6-(isopropylidenehydrazino)pyridaz ine-3(2H)-thione (3....
