1 UDC 2-acetamido-3-O-[(2s,3s)-2-carboxy-3,4-dihydroxybutan-2-yl]-2-deoxy-alpha-D-glucopyranose 1.000 2 AMU N-acetyl-beta-muramic acid 0.833 3 MUB N-acetyl-alpha-muramic acid 0.833 4 AMV Methyl 2-acetamido-3-O-[(1r)-1-carboxyethyl]-2-deoxy-beta-D-glucopyranoside 0.731 5 MDP N-carboxyl-N-methyl-beta-muramic acid 0.731