Neopolyoxin B

5-[[(2S,3S,4S)-2-Amino-4-hydroxy-4-(5-hydroxy-2-pyridinyl)-3-methyl-1-oxobutyl]amino]-1-(4-carboxy-2,3-dihydro-2-oxo-1H-imidazol-1-yl)-1,5-dideoxy-β-D-allofuranuronic acid