| 摘要 |
Pyridinylurea N-oxides of the formula <IMAGE> and acid addition salts thereof; wherein R is cycloalkyl (C3-C8), alkenyl (C3-C8), or an alkyl (C1-C6) group optionally substituted with halogen, hydroxy, cycloalkyl (C3-C8) alkoxy (C1-C6), dialkyl (C1-C6)amino or phenyl; R1 is hydrogen or alkyl (C1-C6); R and R1 together with the nitrogen atom of the NRR1 group optionally define a nonaromatic heterocycle containing 4 to 6 ring carbon atoms; each X independently is halogen, alkyl (C1-C6), haloalkyl (C1-C6), alkoxy (C1-C6), hydroxy, 2-pyridinyl, alkyl(C1-C6)thio or alkyl (C1-C6)sulfonyl; A is 1 to 4; and wherein the NHCONRR1 group is bonded to the pyridinyl ring in the 3- or 4-position. The compounds are useful in agriculture as plant growth regulators.
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