Ruthenium(2+), bis(2,2'-bipyridine-κN1,κN1')[1-[[(4'-methyl[2,2'-bipyridin]-4-yl-κN1,κN1')carbonyl]oxy]-2,5-pyrrolidinedione]-, (OC-6-33)-, hexafluorophosphate(1-) (1:2)