1-Naphthalenesulfonic acid, 3,4-dihydro-3,4-dioxo-, 3-(amidinohydrazone) 1-Naphthalenesulfonic acid, 3,4-dihydro-3-((aminoiminomethyl)hydrazono)-4-oxo- 3,4-Dihydro-3-((aminoiminomethyl)hydrazono)-4-oxo-1-naphthalenesulfonic acid 58851-83-5