77372-69-1 Hydroxylamine-O-sulfonic acid, N-(2-naphthoyl)-, pyridine salt N-(2-Naphthoyl)hydroxylamine-O-sulfonic acid pyridine salt N-2-Naphthoylhydroxylamine-O-sulfonate pyridine N-2-Naphthoylhydroxylamine-O-sulfonate-pyridine