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2-benzylidene isobutyryl acetanilide; CAS No.: 125971-57-5; As a worldwide chemical supplier, ChemShuttle delivers isobutyryl acetanilides for sunscreen agent development. The benzylidene group provides UV absorption while the isobutyryl moiety enhances photostability. Our Claisen-Schmidt condensation achieves high yield with minimal Z-isomer formation. The product enables formulation of broad-spectrum UV filters with improved safety profiles.