FIELD: medicine.
SUBSTANCE: method for making allobetulin exhibits an evident antiviral activity and is of the upmost interest for chemical-pharmaceutical industry. Allobetulin is made of upper birch bark by combining the stages of betulinole extraction from birch bark with aromatic hydrocarbon, and betulinole isomerisation in allobetulin with 30-70% sulphuric acid added.
EFFECT: simplified technology ensured by reduced stages of allobetulin process.
1 cl, 2 tbl, 10 ex
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