| 摘要 |
1,205,144. Hydroxyphenylketobutyric acids. SUN OIL CO. 19 Sept., 1968 [28 Nov., 1967], No. 44496/68. Heading C2C. The invention comprises compounds of the formula wherein R 1 and R 2 are H or C 1- C 3 alkyl groups and R 3 is H. They may be obtained by subjecting a naphthalene compound under fermentation conditions to the action of a ring splitting and hydrocarbon chain-oxidizing type of microorganism and recovering the corresponding ketobutyric acid from the fermentation broth. Examples are given for preparing the compounds. They are useful as plant growth regulators.
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