Synonyms: SM 255;Biphenylene-(4,4')-bis-methyl-(3-alpha-hydroxy)-tropaniumbromide [German];1-alpha-H,5-alpha-H-Tropanium, 4,4'-biphenylenebis(3-alpha-hydroxy-8-methyl-, dibromide;379-85-1;AC1L3R8P;LS-157803;Biphenylene-(4,4')-bis-methyl-(3-alpha-hydroxy)-tropaniumbromide;8,8'-(biphenyl-4,4'-diyldimethanediyl)bis(3-hydroxy-8-methyl-8-azoniabicyclo[3.2.1]octane) dibromide;8-[[4-[4-[(3-hydroxy-8-methyl-8-azoniabicyclo[3.2.1]octan-8-yl)methyl]phenyl]phenyl]methyl]-8-methyl-8-azoniabicyclo[3.2.1]octan-3-ol dibromide