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(E)-3-[2-cyclopropyl-4-(4-fluorophenyl)-3-quinolinyl]-2-propenenitrile; CAS No.: 256431-72-8; As a chemical synthesis company, ChemShuttle delivers cyanoquinolines for fluorescence-based screening assays. The E-configuration and cyclopropyl group optimize -stacking with biological targets. Our Knoevenagel condensation protocol achieves high yield without Z-isomer contamination. The product serves as a building block for FRET probes in real-time enzymatic activity monitoring.