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