149331-75-9 , N-Acetylneuraminic acid dimer disodium salt ; 8-O-(N-Acetylneuraminyl)-N-acetylneuraminic acid disodium salt; N-Acetyl-8-O-(N-acetyl-a-neuraminyl)-neuraminic acid disodium salt; Neu5Ac-a-2,8-Neu5Ac 2Na C22H34N2O17·2Na / 644.49149331-75-9 , N-Acetylneuraminic acid dimer disodium salt ; 8-O-(N-Acetylneuraminyl)-N-acetylneuraminic acid disodium salt; N-Acetyl-8-O-(N-acetyl-a-neuraminyl)-neuraminic acid disodium salt; Neu5Ac-a-2,8-Neu5Ac 2Na