The fluorophore conjugated oligosaccharide fragment 1, wherein {HEAD ~ the oligosaccharide fragment} is prepared from {TAIL ~ said O antigen polysaccharide} by a reductive process 
is prepared from
The fluorophore conjugated oligosaccharide fragment 1 , wherein { HEAD ~ the oligosaccharide fragment } is prepared from { TAIL ~ said O antigen polysaccharide } by a reductive process
OTH OTH OTH OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL REL REL TAIL TAIL TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH OTH