64325-50-4 3(2H)-Oxazolepropanesulfonic acid,2-[[3,5-dioxo-1-(4-sulfophenyl)-4-pyrazolidinylidene]ethylidene]-4-methyl-, disodium salt
64325-69-5 3(2H)-Oxazolepropanesulfonic acid,2-[[3-(dibutylamino)-1,5-dihydro-5-oxo-1-(4-sulfophenyl)-4H-pyrazol-4-ylidene]ethylidene]-5-methyl-, disodium salt