1-Propanaminium, N,N,N-trimethyl-3-((7-oxo-7H-furo(3,2-g)(1)benzopyran-9-yl)oxy)-, bromide 96616-53-4 N,N,N-Trimethyl-3-((7-oxo-7H-furo(3,2-g)(1)benzopyran-9-yl)oxy)-1-propanaminium bromide