CAS 552-54-5 appears in our catalog under these names: 3,7-Dimethoxy-3',4',5-Trihydroxyflavone, 3’,7-Di-O-methyl Quercetin, Rhamnazin, Rhamnazin, ≥98%, ≥98%, Rhamnazin, 99.00%. Offered by: Biosynth, TRC, GLPBio, Sigma-Aldrich, Chemat. Available pack sizes: 10mg, 5mg, 100mg, 20mg, 5 mg, 1 mg.