Amino acid derivatives

摘要

FIELD: chemical industry and pharmaceutical industry. SUBSTANCE: present invention describes amino acid derivatives of formula I: wherein R is C1-C8 alkoxycarbonyl or group of formula: wherein R is C1-C8 alkyl; R is hydrogen, and R is hydroxy group or R and R in combination are oxo group; R is C1-C8 alkoxycarbonyl or C1-C8-alkylcarbamoyl; R and R in combination are trimethylene or tetramethylene; R is phenyl-C1-C8 alkoxycarbonyl, quinolylcarbonyl; R is C1-C8 alkyl, phenyl-C1-C8 alkyl, cyano-C1-C8 alkyl, carbamoyl-C1-C8 alkyl, C1-C8-alkyltyl-C1-C8 alkyl, carbamoyl-C1-C8 alkyl or pharmaceutically acceptable basic salts thereof and are used for prophylaxis or treatment of viral infections. They are prepared by well known methods. EFFECT: improved properties of the pharmaceutical composition. 19 cl, 1 tbly