Popp F D, Parson R, Donigan B E
J Pharm Sci. 1980 Oct;69(10):1235-7. doi: 10.1002/jps.2600691035.
Substituted isatins were condensed with acetone and other ketones to give analogs of 3-hydroxy-3-acetonyloxindole. Some of these alcohols were dehydrated. Several compounds with anticonvulsant activity were obtained.