4978
In this work , we have developed and evaluated a new targeted lipopolyplex ( LPP ) , by combining polyethylenimine ( PEI ) , 1 , 2 - dioleoyl - 3 - ( trimethylammonium ) propane ( DOTAP ) / Chol liposomes , the plasmids pCMVLuc / pCMVIL - 12 , and the ligand folic acid ( FA ) , able to transfect HeLa and B16 - F10 cells in the presence of very high concentration of serum ( 60 % FBS ) .
 Chemical: polyethylenimine; Chemical: PEI; Chemical: 1 , 2 - dioleoyl - 3 - ( trimethylammonium ) propane; Chemical: DOTAP; Chemical: folic acid
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: polyethylenimine; Chemical: PEI; Chemical: 1 , 2 - dioleoyl - 3 - ( trimethylammonium ) propane; Chemical: DOTAP; Chemical: folic acid