A prodrug comprises {TAIL ~ a polyhydroxylated polyamine} to which {HEAD ~ a drug} is linked by the intermediary of a peptidyl group 
to is linked
A prodrug comprises { TAIL ~ a polyhydroxylated polyamine } to which { HEAD ~ a drug } is linked by the intermediary of a peptidyl group
OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL TAIL REL OTH HEAD HEAD HEAD HEAD HEAD HEAD REL REL OTH OTH OTH OTH OTH OTH OTH