CAS 537-73-5 appears in our catalog under these names: 3-Hydroxy-4-methoxycinnamic Acid (Isoferulic Acid), 3–Hydroxy–4–methoxycinnamic acid, Isoferulic acid/ 99.49% (existing batch purity), 3-Hydroxy-4-methoxycinnamic acid, predominantly trans, 98+% , Ferulic acid. Offered by: TRC, GLPBio, TargetMol, Thermo Scientific (Alfa Aesar), Biosynth. Available pack sizes: 1g, 500mg, 20mg, 200mg, 5g, 25g, 50g, 100g.