4-n-Butoxyphenylacetohydroxamic acid, O-sulfate, pyridine salt 77372-66-8 Hydroxylamine-O-sulfonic acid, N-((4-butoxyphenyl)acetyl)-, compd. with pyridine (1:1) Hydroxylamine-O-sulfonic acid, N-(4-butoxyphenylacetyl)-, pyridine salt N-4-Butoxyphenylacetylhydroxylamine-O-sulfonate-pyridine