3,4-Dihydroxybenzohydroxamic acid 3,4-Dihydroxyphenylhydroxamic acid 69839-83-4 BRN 2096682 Benzamide, N,3,4-trihydroxy- CCRIS 7909 Didox N,3,4-Trihydroxybenzamide NSC 324360 NSC-324360 VF 147