15440-70-7 157-03-9 4-04-00-03278 (Beilstein Handbook Reference) 543-31-7 6-DIAZO-5-OXO-L-NORLEUCINE AI3-26441 BRN 1725815 DON DON (pharmaceutical) L-DON L-Norleucine, 6-diazo-5-oxo- (9CI) NSC 7365 Norleucine, 6-diazo-5-oxo, L-