2-aminooxyacetic acid 2-aminooxyethanoic acid Aminooxyacetic acid BRN 0878238 U 7524 ST5437594 Lopac-A-4508 NCGC00015058-01 AOA Lopac0_000007 (Carboxymethoxy)amine (o-Carboxymethyl)hydroxylamine ACETIC ACID, (AMINOOXY)- AOAA