CAS 51791-26-5 appears in our catalog under these names: trans-4-Fluorocinnamaldehyde, trans-4-Fluorocinnamaldehyde 95%, TRANS-4-FLUOROCINNAMALDEHYDE, 95%, (E)-3-(4-Fluorophenyl)acrylaldehyde, 95%, 95%. Offered by: Biosynth, Ambeed, Sigma-Aldrich, Chemat. Available pack sizes: 100mg, 250mg, 500mg, 1000mg, 1g, 5g, 10g, 25g.