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