Methyl-4-O-acetyl-3-O-(3,4-di-O-acetyl-2,6-didesoxy-α-D-lyxo-hexopyranosyl)-2,6-didesoxy-α-D-lyxo-hexopyranosid

2,6-anhydro-1,4,5,7-tetradeoxy-D-threo-hept-4-en3-ulose