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However , modification of the polyethylene glycol with folic acid to target folate receptors significantly decreased the IC50 values recorded in all cells lines tested , particularly HeLa cells cultured in media containing physiological concentrations of folic acid with the lowest IC50 being recorded as 0 . 0962 mM for folate - targeted cyclo ( His - Ala ) .
 Chemical: polyethylene glycol; Chemical: folic acid; Chemical: folic acid; Chemical: folate; Chemical: cyclo ( His - Ala )
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: polyethylene glycol; Chemical: folic acid; Chemical: folic acid; Chemical: folate; Chemical: cyclo ( His - Ala )