| 摘要 |
FIELD: chemistry; medicine. ^ SUBSTANCE: invention pertains to nucleoside derivatives with general formula (I) , where R1 represents hydrogen; COR5, where R5 is chosen from C1-18 alkyl, phenyl, CH2OPh and CH2Ph; C(=O)OR5, where R5 represents C1-18 alkyl; or COCH(R6)NHR7, where R6 represents C1-5 alkyl, and R7 represents R5OCO, where R5 is C1-18 alkyl, R2 represents hydrogen; COR5 , where R5 is chosen from C1-18 alkyl, C1-18 alkenyl, phenyl or CH2OPh; C(=O)OR5, where R5 is chosen from C1-18 alkyl, C1-18 alkenyl, substituted with low alkyl; C(=O)NHR5, where R5 represents C1-18 alkenyl; or COCH(R6)NHR7, where R6 is chosen from side-chains of natural amino acid and C1-5alkyl, and R7 is chosen from hydrogen and R5OCO, where R5 is C1-18 alkyl; R3 and R4 are the same and are chosen from hydrogen; COR5, where R5 is chosen from C1-18 alkyl, or phenyl; C(=O)OR5, where R5 is C1-18 alkyl, or R3 and R4 together represent C(CH3)2; or their pharmaceutical acidic additive salts; under the condition that, at least one of R1, R2, R3 or R4 is not hydrogen. The invention also relates to pharmaceutical compositions, which have antiviral activity to HCV. ^ EFFECT: obtaining of a range of new biologically active substances. ^ 15 cl, 2 tbl, 9 ex |
