Methylene Blue, methylthionine chloride or 3,7-bis(dimethylamino)phenothiazin-5-ium chloride is a chemical compound used as a dye and medication for Gram's stain, Wright stain[?], and the treatment of metoxyhemoglobinemia.
... Spanish members who had fought in the Republican side of the Spanish Civil War.
Resistance groups also helped Allied pilots who had been shot down to get back to ...