The present invention relates to a novel inhibitor for multiple protein kinases, and provides: a novel indolin-2-one compound or a pharmaceutically acceptable salt thereof that exhibits excellent anti-inflammatory activity; and a composition for treating inflammatory diseases, containing same as an active ingredient. The novel compound strongly inhibits the activity of various protein kinases related to inflammation, and thus can be used as an inhibitor for multiple protein kinases, and has an excellent anti-inflammatory effect as compared to other anti-inflammatory drugs, and thus can be used in the development of therapeutic agents for inflammatory diseases.
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