CAS 3774-64-9 appears in our catalog under these names: Questin, 1,6-Dihydroxy-8-methoxy-3-methylanthracene-9,10-dione, ≥95%, ≥95%, Questin, 97.75%. Offered by: GLPBio, Chemat, MedChemExpress. Available pack sizes: 1mg, 5mg, 10mg, 20mg, 50mg, 5 mg, 1 mg, 10 mg.