Used in pharmaceutical research as a key intermediate in the synthesis of bioactive molecules, particularly in the development of kinase inhibitors and anti-cancer agents. Its structural motif is found in compounds that exhibit antiproliferative activity against various tumor cell lines. Also employed in the study of serotonin receptor modulators due to its indolinone core with methoxy substitution, which can influence binding affinity and metabolic stability. Commonly utilized in medicinal chemistry for scaffold modification and structure-activity relationship (SAR) studies.