21924
Liposomes were composed of phosphatidylcholine , hydrogenated soy phosphatidylcholine ( HSPC ) , stearylamine , alpha - tocopherol and 1 , 2 - distearoyl - sn - glycero - 3 - phosphoethanolamine - N - [ amino ( polyethylene glycol ) - 2000 ] ( PEG - DSPE ) or folate - polyethylene glycol - cholesteryl hemisuccinate ( F - PEG - CHEMS ) using the thin - film hydration method and characterized for size and encapsulation .
 Chemical: phosphatidylcholine; Chemical: phosphatidylcholine; Chemical: stearylamine; Chemical: alpha - tocopherol; Chemical: 1 , 2 - distearoyl - sn - glycero - 3 - phosphoethanolamine - N - [ amino ( polyethylene glycol ) - 2000 ]; Chemical: PEG - DSPE; Chemical: folate - polyethylene glycol - cholesteryl hemisuccinate; Chemical: F - PEG - CHEMS
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: phosphatidylcholine; Chemical: phosphatidylcholine; Chemical: stearylamine; Chemical: alpha - tocopherol; Chemical: 1 , 2 - distearoyl - sn - glycero - 3 - phosphoethanolamine - N - [ amino ( polyethylene glycol ) - 2000 ]; Chemical: PEG - DSPE; Chemical: folate - polyethylene glycol - cholesteryl hemisuccinate; Chemical: F - PEG - CHEMS