3,9-Dihydro-8-methoxy-9-methyl-2-(1-methylethyl)furo(2,3-b)quinolin-4(2H)-one 52486-77-8 Furo(2,3-b)quinolin-4(2H)-one, 3,9-dihydro-8-methoxy-9-methyl-2-(1-methylethyl)- NSC 77152