5-Benzoxazolesulfonicacid,2-[4-[1,5-dihydro-3-methyl-5-oxo-1-(4-sulfophenyl)-4H-pyrazol-4-ylidene]-2-butenylidene]-3-ethyl-2,3-dihydro-(9CI); 4H-Pyrazole, 5-benzoxazolesulfonic acid deriv. (8CI)
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