FIELD: organic chemistry.
SUBSTANCE: compound of formula (1), where R1 represents hydrogen or fluorine, its pharmaceutically acceptable salts, application, method of treatment, pharmaceutical composition, method for obtaining a compound of Formula (1) by hydrolysis of a compound of Formula (15) in acidic conditions.
EFFECT: compound of Formula (VI) with inhibitory activity against TYK2 kinase.
23 cl, 9 tbl, 4 ex
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