2-Methyl-5-phenyl-3-(3-sulfopropyl)benzoxazolium inner salt 2-Methyl-5-phenyl-3-(3-sulphonatopropyl)benzoxazolium 66142-15-2 Anhydro-2-methyl-5-phenyl-3-(3-sulfopropyl)benzoxazolium hydroxide Benzoxazolium, 2-methyl-5-phenyl-3-(3-sulfopropyl)-, inner salt EINECS 266-175-2