| 摘要 |
<p>U>.S. SN 776,394 Filed March 10, 1977 ?N76-39-US ?EL:mml 1-ARYL-1,4-DIHYDRO-4-OXO-PYRIDAZINES Compounds of the formula wherein R1 is carboxy, carboxylate, or carbalkoxy, R2 is phenyl or substituted phenyl, R3 is alkyl, and R4 is hydrogen, alkyl, or halogen, are active as plant growth regulators, and particularly as chemical hybridization agents.</p> |
