4980
The combination of folic acid with lipopolyplexes also enhanced significantly the transfection activity of the therapeutic gene interleukin - 12 ( IL - 12 ) , without any significant cytotoxicity .
 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: folic acid