CAS 90-18-6 appears in our catalog under these names: Quercetagetin/ 99.76% (existing batch purity), Quercetagetin, Quercetagetin 99%, 2-(3,4-Dihydroxyphenyl)-3,5,6,7-tetrahydroxy-4H-chromen-4-one, 99%, 99%, Quercetagetin, min. 95 %, 5 mg. Offered by: TargetMol, GLPBio, Biosynth, Ambeed, Chemat. Available pack sizes: 1mg, 5mg, 10mg, 25mg, 50mg, 100mg, 500mg, 10mM (in 1ml dmso).