4-[[Dihydroxy(trihydroxysilyloxy)silyl]oxy-[[[2-hydroperoxyperoxysulfanyl-3-hydroperoxysulfonyl-5-sulfooxy-6-(trioxidanylsulfanylmethyl)oxan-4-yl]oxysulfonyloxy-hydroxy-(hydroxy-methyl-trihydroxysilyloxysilyl)oxysilyl]peroxy-dihydroxysilyl]oxy-hydroxysilyl]oxysulfonyloxy-2-[5-(dimethylamino)-4-hydroxy-2-methylphenyl]-5-sulfooxy-6-(sulfooxymethyl)oxane-2,3-disulfonoperoxoic acid