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