英文名称:2-O-(P-Nitrophenyl)-Α-D-N-Acetylneuraminic Acid, Ammonium Salt Disscontinued See N502501; Neu5Ac2-Α-Pnp; 2-O-(P-Nitrophenyl)-Α-D-N-Acetylneuraminic Acid, Sodium Salt, X Hydrate; 2-O-(p-Nitrophenyl)-α-D-N-acetylneuraminic Acid, Sodium Salt, X Hydrate