NEW SULFONAMIDE DERIVATIVE AND ANTIPARASITIC AGENT CONTAINING THE SAME AND USED FOR FISHES

摘要

PROBLEM TO BE SOLVED: To provide a new sulfonamide derivative, and to provide an antiparasitic agent which is formulated into a feed or added to culturing water to use the antiparasitic agent and is used for fishes. SOLUTION: This sulfonamide derivative of general formula I or its salt, such as N'-[(1E)-1-(2,4-dichlorophenyl)propylidene]benzenesulfonohydrazide, and the antiparasitic agent for the fishes contains the same as an active ingredient.