| 摘要 |
alpha-Ketol unsaturated fatty acid derivatives represented by the following formula (1), alpha-ketol unsaturated fatty acid amide derivatives represented by the following formula (6), and plant growth regulators containing, as the active ingredient, at least one of these derivatives: wherein R<1 >represents linear C1-5 alkyl; R<2 >represents hydrogen, etc.; R<3 >represents hydrogen, etc.; R<4 >represents hydrogen, etc.; R<5 >represents hydrogen, etc.; n is an integer from 3 to 15; and the carbon atoms at the A- and B-positions may be in either (R)- or (S)-configuration; and wherein R<7 >represents C1-17 alkyl, etc; R<8 >represents hydrogen, etc.; R<9 >represents alpha-ketolalkylene; and R<10 >represents specific divalent linear hydrocarbyl.
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