发明授权
US4511723A Halogenated 1-hydroxypyrazoles 失效
卤化1-羟基吡唑

Halogenated 1-hydroxypyrazoles
摘要:
1-Pyrazolyl-phosphoric acid esters of the formula ##STR1## their preparation and use as crop protection agents, and their immediate precursors, i.e. halogenated 1-hydroxypyrazoles of the formula ##STR2## where R.sup.1 to R.sup.5, X and Y have the meanings given in the claims and description.
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