| 摘要 |
<p>Title cpds are of formula (where A= satd. or ethylene opt. branched hydrocarbon R=1 or 2 opt. substituents selected from alkyl, alkenyl halogen, cycloalkyl, aryl, aralkyl, aralenyl, CN, NO2 alkoxy, aryloxy, aralkoxy, alkylthio, arylthio, aralkylthio, aryloxymethyl, arylthiomethyl and CF3. RI and RII=1-3, opt. substituents each selected from halogens, alkyl, CF3 and alkoxy., RIII and RIV = H or lower alkyl.</p> |
