2-(p-Chlorobenzamido)acetohydroxamic acid 38274-54-3 4-Chloro-N-(2-(hydroxyamino)-2-oxoethyl)benzamide AIDS-128126 AIDS128126 Benurestat Benzamide, {4-chloro-N-[2-(hydroxyamino)-2-oxoethyl]-} EU 2826 EU-2826 NSC220913