Azure ii37247-10-2100 % similar Azure B531-55-5100 % similar Methylene blue61-73-476 % similar Methylene blue trihydrate7220-79-370 % similar Azure A531-53-364 % similar Azure C531-57-764 % similar Toluidine blue92-31-957 % similar Thionine581-64-641 % similar Acridine orange494-38-240 % similar Pyronine92-32-034 % similar Neutral red553-24-233 % similar