| 摘要 |
FIELD: fine organic synthesis, in particular production of triterpene compounds, betulin, useful in pharmaceutical and cosmetic industry. ^ SUBSTANCE: betulin is isolated from birch bark by extraction with neutral organic solvents, namely dioxan aqueous solution containing 0-20 mass % of water. ^ EFFECT: accelerated extraction process, increased yield of target product, decreased concentration of ester contaminants, and simplified betulin purification. ^ 1 cl, 7 ex, 1 tbl |
