CAS 1891-42-5 appears in our catalog under these names: Hulupinic acid/ 99.76% (existing batch purity), Hulupinic acid, 4,5-Dihydroxy-2,2-bis(3-methylbut-2-en-1-yl)cyclopent-4-ene-1,3-dione, ≥98%, ≥98%, Hulupinic acid. Offered by: TargetMol, GLPBio, Chemat, MedChemExpress. Available pack sizes: 1mg, 5mg, 10mg, 25mg, 20mg, 1 mg.