FIELD: chemistry.
SUBSTANCE: acetylhydrazone 1-cyano-19β,28-epoxy-2,3-seco-18α-olean-3-al of formula I: 
has high prophylactic activity ID50 0.0001589 mcg/ml and efficiently inhibits reproduction of vesicular stomatitis virus "Indiana" strain in primarily infected cells ID50 0.21 mcg/ml.
EFFECT: high efficiency of the compounds.
3 tbl, 2 cl, 1 ex, 3 tbl
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