CAS 74442-16-3 appears in our catalog under these names: 4,4,6,8-Tetramethyl-4h-pyrrolo[3,2,1-ij]quinoline-1,2-dione, 95%, 4,4,6,8-TEtramethyl-4h-pyrrolo(3,2,1-ij)quinoline-1,2-dione, 95%. Offered by: Combi-blocks, AmBeed. Available pack sizes: 1g, 5g.