1155.1 ,1'- {methylenbis[(4,1-fenylen)azo{1-[3-(dimethylamino)propyl]-6-hydroxy-4-methyl-2-oxo-1,2-dihydropyridin-5,3-diyl}]} dipyridinium-dichlorid-dihydrochlorid (ES č. 401-500-5)