1923019 MUNANA 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 9 2122278 4MU-NeuAc 4-methylumbelliferyl-N-acetylneuraminic acid 5 2063816 4-MU-NANA 2'-(4-methylumbelliferyl)-alpha-d-N-acetylneuraminic acid 3 2063817 4-MUNANA 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 3 3070427 MUAN 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 2 2122275 4-MU-NeuAC 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 1 2745330 4MU-AcNeu 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 1 2151900 MUB-NeuNAc 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 1 3177618 MUNeuNAc 2'-(4-methylumbelliferyl)-alpha-D-N-acetylneuraminic acid 1