| http://www.w3.org/ns/prov#value | - This indanthrone sulfoderivative is characterized by a structural formula selected from the group consisting of structures I and II: where n is an integer equal to 3 or 4; R is individually selected from the group consisting of CH3, C2H5, OCH3, OC2H5, Cl, Br, OH, NH2; z is an integer in the range of 0 to 4; M is a counterion; and j is the number of counterions in a dye molecule.
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