Iron(1+), bis(1-(5-((4-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)phenyl)azo)-1-(3-(dimethylamino)propyl)-1,2-dihydro-6-hydroxy-4-methyl-2-oxo-3-pyridinyl)pyridiniumato(2-))-, salt with 2-hydroxypropanoic acid (1:1), bis(2-hydroxypropanoate) (salt);Iron(1+), bis(5'-((4-(4,5-dihydro-4-((2-hydroxy-5-nitrophenyl)azo)-3-methyl-5-oxo-1H-pyrazol-1-yl)phenyl)azo)-1'-(3-(dimethylamino)propyl)-1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-1,3'-bipyridiniumato(2-))-, salt with 2-hydroxypropanoic acid (1:1), bis(2-hydroxypropanoate) (salt);Iron(1+), bis(5'-(2-(4-(4,5-dihydro-4-(2-(2-(hydroxy-kappaO)-5-nitrophenyl)diazenyl-kappaN1)-3-methyl-5-(oxo-kappaO)-1H-pyrazol-1-yl)phenyl)diazenyl)-1'-(3-(dimethylamino)propyl)-1',2'-dihydro-6'-hydroxy-4'-methyl-2'-oxo-1,3'-bipyridiniumato(2-))-, 2-hydroxypropanoate, 2-hydroxypropanoate (1:1:2);iron(3+) 1-{(5Z)-1-[3-(dimethylamino)propyl]-4-methyl-5-[2-(4-{(4Z)-3-methyl-4-[(2E)-(3-nitro-6-oxocyclohexa-2,4-dien-1-ylidene)hydrazinylidene]-5-oxo-4,5-dihydro-1H-pyrazol-1-yl}phenyl)hydrazinylidene]-2,6-dioxo-1,2,5,6-tetrahydropyridin-3-yl}-1,4-dihydropyridin-4-ide 2-hydroxypropanoate - 2-hydroxypropanoic acid (1:2:1:2)