{HEAD ~ The dyes} are useful as fluorescent labels of biomolecules, such as oligonucleotides and {TAIL ~ deoxyribonucleosides} 
{ HEAD ~ The dyes } are useful as fluorescent labels of biomolecules , such as oligonucleotides and { TAIL ~ deoxyribonucleosides }
HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL