Entrapped in the liposomes is {HEAD ~ the topoisomerase inhibitor} at a concentration of at least about 0.10 μmole drug per {TAIL ~ μmole lipid} 
Entrapped in the liposomes is { HEAD ~ the topoisomerase inhibitor } at a concentration of at least about 0.10 μmole drug per { TAIL ~ μmole lipid }
OTH OTH OTH OTH OTH HEAD HEAD HEAD HEAD HEAD HEAD HEAD OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH OTH TAIL TAIL TAIL TAIL TAIL TAIL