FIELD: organic chemistry, pharmacy. SUBSTANCE: invention relates to derivatives of succinoylaminohydroxyethylamino-sulfoneamide of the formula (I) 
where R1 - H, C1-C10-alkyl; R2 is C1-C10-alkyl, aryl-C1-C10-alkyl possibly substituted with halogen atom or C3-C8-cycloalkyl; R3 is C1-C10-alkyl, C1-C10-halogen-alkyl, C3-C8-cycloalkyl, C3-C8-cycloalkyl-C1-C10-alkyl; R4 is C1-C10-alkyl, C1-C10-halogenalkyl, C3-C8-cycloalkyl, phenyl possibly substituted with one or some substituents taken from amino-group, halogen atom, C1-C10-alkyl, C1-C10-alkoxy-group, C1-C10-halogenalkyl or hydroxy-group; X1 - oxygen, nitrogen atom; R31,R32 - H, C1-C10-alkyl; R33,R34 independently - H, phenyl-C1-C10-alkyl at condition that if X1 means oxygen atom then R34 is absent; t = 0, 1. Compounds are used as a pharmaceutical composition showing antiviral activity for treatment of patients with retroviral infection. EFFECT: antiviral activity of compounds, improved method of treatment. 36 cl, 9 tbl, 10 ex
