| 摘要 |
<p>A compound having the formula: <CHEM> wherein each of X<1> and X<2>, which may be the same or different, is halogen, and R<1> wherein R<1> is an alkyl group or a cycloalkyl group each optionally halo- or alkoxy-substituted, and each containing up to 6 carbon atoms or R<1> is phenyl or benzyl, both of which may be optionally substituted with one or more of the following: halogen, alkyl or haloalkyl each containing from 1 to 5 carbon atoms, alkoxy or haloalkoxy each containing from 1 to 4 carbon atoms, nitro, cyano, hydroxy, alkylthio containing from 1 to 4 carbon atoms, or phenyl or phenoxy groups; and wherein the alkyl moiety of the benzyl is optionally substituted with alkyl containing from 1 to 4 carbon atoms, or phenyl.</p> |
