| 摘要 |
<p>Antiparasitic agents of formula (I), (II) or (III) where R?1 and R2¿ are independently H or optionally substituted C¿1?-C8 alkyl, alkenyl, alkynyl, C2-C8 alkanoyl, alkenoyl or alkynoyl, arylalkanoyl, arylcarbonyl, or C1-C8 alkylsulphonyl or arylsulphonyl, at least one of R?1 and R2¿ being other than H, R3 is oxo, optionally O-substituted oximino or optionally substituted methylene, R4 is oxo, optionally substituted imino, optionally O-substituted oximino or -OR5 where R5 is as defined for R1.</p> |
