| 摘要 |
Cpds. of formula: (where R and R1 are 1-6C alkyl; R2 is Me or Ph) are insecticides, acaricides and rodenticides, and may be prepd. by reacting an N-halomethyl-pyridazinone with the alkali(ne earth) metal or NH4 salt of the appropriate alkyldithiophosphonic acid alkyl ester.
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