| 摘要 |
<p>Pyrimidine compounds useful as plant growth regulators have the formula (I): <CHEM> wherein Y is an optionally substituted secondary or tertiary alkyl group containing from 3 to 7 carbon atoms or an optionally substituted cycloalkyl or alkylcycloalkyl group containing from 3 to 7 carbon atoms; R<1> and R<2>, are hydrogen or a lower alkyl group; A is an optionally substituted phenyl group; n is an integer which may be 1 or 2; and R<3> is hydrogen, an alkyl group containing from 1 to 4 carbon atoms, or an alkenyl or alkynyl group containing from 2 to 4 carbon atoms.</p> |
