1959-4 number of substituted 4, 9-naphth (2, 3) imidazolediones have been synthesized. Solubility in fatty oils has been increased by introducing substituents of high carbon and hydrogen content in the 2-position. Increased solubility in water was effected by introducing the hydroxyl or carboxyl group in the side chain in the 2-position and by introducing an amino group into the 5-position.
