Triterpene glycosides of ladyginia bucharica III. Structure of ladyginoside C
SummaryThe structure of ladyginoside C — a trioside of oleanolic acid — has been established. The carbohydrate chain is attached to the hydroxyl at C3 of the aglycone and consists of β-D-glucopyranosyl-(1→4)-α-L-arabopyranosyl-(1→4)-β-D-glucopyranuronic acid.
Steroid‐ und Triterpen‐glykoside. 3. Mitteilung. Glucoside von Oleanolsäure‐estern und glykosidische Bindung im Zuckerrüben‐Saponin
Durch Kondensation von Acetobrom-glucose (II) mit Oleanolsaure-methylester (la) wurde das Oleanolsaure-methylester-β, D-glucosid-tetraacetat (IV) und daraus das Oleanolsaure-methylester-β, D-glucosid (IVa) hergestellt; Oleanolsaure-benzhydrylester-β, D-glucosid-acetat (IVc) ist analog zuganglich.
SEASONAL AND REGIONAL MPG AS INFLUENCED BY ENVIRONMENTAL CONDITIONS AND TRAVEL PATTERNS
In-use fuel economy shortfall varies regionally and seasonally in response to changing environmental conditions and travel patterns. Shortfall changes by 25 percent or more are associated with variation in miles travelled per day by in-use vehicles. Monthly variations in northern states are twice those in the south; air conditioning penalties also vary by region. Although regional difference in annual levels are relatively small, shortfall can increase by 16 percent in densely populated urban areas. These variations have been quantified in an analysis of time-series mpg data and related to variables commonly reported in fuel economy surveys.