| 摘要 |
New sulphur containing phosphorus compounds of pyrido-oxazole derivatives, their manufacture and use as pesticides are disclosed. The new compounds correspond to the formula WHEREIN R1 represents halogen or nitro, R2 represents hydrogen or lower alkyl, R3 represents alkyl, alkoxy, alkenyloxy, alkynyloxy, phenyl, amino, monoalkylamino or dialkyl-amino, R4 represents alkyl, alkenyl or alkynyl, and X and Y each represent oxygen or sulphur.
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