In further embodiments, {HEAD ~ an anti cancer agent} comprises one or more of {TAIL ~ the oligonucleotides} of the invention 
In further embodiments , { HEAD ~ an anti cancer agent } comprises one or more of { TAIL ~ the oligonucleotides } of the invention
OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD HEAD REL OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL OTH OTH OTH