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