FIELD: chemistry.
SUBSTANCE: invention relates to a salt of a compound of formula
wherein R1 denotes methyl, ethyl, butyl or cyclopropylmethyl, R2 denotes phenyl, where phenyl contains a substitute selected from a group, including trifluoromethoxy group and difluoromethoxy group, and R3 denotes hydrogen, methyl, chloro, methoxy group or trifluoromethyl, with organic sulphonic acid or its solvate, or hydrate, their solvates and hydrates and their use as antiviral agents.
EFFECT: novel compounds.
14 cl, 1 dwg, 4 tbl, 1 ex
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