2-O-(tert-butyldimethylsilyl)-6-deoxy-4-O-(methoxymethyl)-3,5-O-isopropylidene-L-gulose N,N-dimethylhydrazone

methyl 6-deoxy-2,3-O-(1-methylethylidene)-4-O-methyl-β-L-gulopyranoside

methyl 6-deoxy-α-L-gulopyranoside

methyl 6-deoxy-β-L-gulopyranoside