1745-32-0 3,3'-Diethyl-9-methylthiacarbocyanine bromide 9-Methylthiacarbocyanine bromide Benzothiazolium, 3-ethyl-2-[3-(3-ethyl-2(3H)-benzothiazolylidene)-2-methyl-1-propenyl]-, bromide Cyanine I G 1740 NSC119676