138833-52-0 4-(4-N-Sodium-N-(5-ethyl-1-thia-3,4-diazol-2-yl)sulfophenylamino)-5-methoxy-1,2-benzoquinone 4-(N-(5-Ethyl-1-thia-3,4-diazol-2-yl)sulfophenylamino)-5-methoxy-1,2-benzoquinone 4-Etdsmb Benzenesulfonamide, N-(5-ethyl-1,3,4-thiadiazol-2-yl)-4-((6-methoxy-3,4-dioxo-1,5-cyclohexadien-1-yl)amino)- N-(5-Ethyl-1,3,4-thiadiazol-2-yl)-N-sulfanilamido-5-methoxy-1,2-benzoquinone