| 摘要 |
Compounds of formula (I) <IMAGE> (I) wherein R1 is hydrogen, and R2 is cyano or -C(=S)-NH-R3; or R1 and R2 taken together are =C(NH2)2 or =C(R5)(NHR3'); R3 and R3' are hydrogen or -COOR4; R4 is C1-C10 alkyl, substituted C1-C10 alkyl, C2-C10 alkenyl, substituted C2-C10 alkenyl, phenyl, or substituted phenyl; and R5 is hydrogen or -S-R6 where R6 is C1-C4 alkyl, cyano-C1-C4 alkyl or pyridyl-C1-C4 alkyl, and salts thereof, are useful antiviral agents.
|
