3.2.1.50	2-acetamido-2-deoxy-alpha-D-glucoside acetamidodeoxyglucohydrolase, AgnB, AgnC, alpha-acetylglucosaminidase, alpha-N-acetylglucosaminidase, BMN 250, exo-glycosidase, glycosidase, heparan N-sulfatase, N-acetyl-alpha-D-glucosaminidase, N-acetyl-alpha-glucosaminidase, NAG, NAGase, NAGLU, Sanfilippo b corrective factor