| 摘要 |
Compounds of formula (I) <CHEM> wherein: R<1> is hydrogen, and R<2> is cyano, or -C(=S)-NH-R<3>; or R<1> and R<2> taken together are =C(NH2)2 or =C(R<5>)(NHR<3> min ); R<3> and R<3> min are hydrogen or -COOR<4>; R<4> is C1-C10 alkyl, substituted C1 -C10 alkyl, C2-C10 alkenyl, substituted C2-C10 alkenyl, phenyl, or substituted phenyl; and R<5> is hydrogen or -S-R<6> where R<6> is C1-C4 alkyl, cyano-C1-C4 alkyl or pyridyl-C1-C4 alkyl, and salts thereof, are useful antiviral agents. |
