2,2'-(2,4-Dioxo-1,3-diazetidine-1,3-diyl)bis(4-isocyanato-5-methylbenzenesulphonic) acid;4-isocyanato-2-[3-(5-isocyanato-4-methyl-2-sulfo-phenyl)-2,4-dioxo-1,3-diazetidin-1-yl]-5-methyl-benzenesulfonic acid
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