Iron(1+), bis[1-[5-[[4-[4,5-dihydro-4-[(2-hydroxy-4-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(