CAS 777857-42-8 appears in our catalog under these names: 3-(3,5,9-Trimethyl-7-oxo-7h-furo[3,2-g]chromen-6-yl)propanoic acid, 95%, 3-(3,5,9-Trimethyl-7-oxo-7H-furo(3,2-g)chromen-6-yl)propanoic acid, 97%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 5g.