Original sentence: Valnoctamide is a racemic compound with four stereoisomers, all of which were shown to be more effective than valproic acid in animal models of epilepsy and one of which ((2S,3S)-valnoctamide) was considered to be a good candidate by
Edited sentence: Valnoctamide is a racemic compound with four stereoisomers, all of which were shown to be more effective than valproic acid in animal models of epilepsy and one of which [(2S,3S]-valnoctamide) was considered to be a good candidate by