| 摘要 |
Compounds of the formula WHERE Y represents chloro, alkoxy or alkythio of a maximum of four carbon atoms; R1 represents alkyl, or alkoxyalkyl containing from one to eight carbon atoms; R2 represents alkyl containing from one to eight carbon atoms with the provision that the sum of the carbon atoms in R1 and R2 is from 4 to 10 and R3 is a 1-cyclopenten-1-yl, a 1-cyclohexen-1-yl, a 1-cyclohepten-1-yl, or a lower alkyl or lower alkoxy substituted 1-cyclopenten-1-yl, 1-cyclohexen-1-yl, or 1-cyclohepten-1-yl group.
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