127099-59-6 4-Acetamido-4-deoxy-N-acetylneuraminic acid 4-Adana D-glycero-beta-D-galacto-2-Nonulopyranosonic acid, 4,5-bis(acetylamino)-3,4,5-trideoxy- N-Acetyl-4-deoxy-4-acetamidoneuraminic acid