63815-98-5 Benzothiazolium, 2-(2-((3-ethyl-5-methoxy-2(3H)-benzoselenazolylidene)methyl)-1-butenyl)-6-methoxy-5-methyl-3-(3-sulfopropyl)-, hydroxide, inner salt Benzothiazolium, 2-(2-((3-ethyl-5-methoxy-2(3H)-benzoselenazolylidene)methyl)-1-butenyl)-6-methoxy-5-methyl-3-(3-sulfopropyl)-, inner salt