4081
Among the chemical inhibitors tested , l - cysteine showed the best inhibitory effect , with an IC ( 50 ) of 1 . 3 +/- 0 . 002 mM followed by ascorbic acid ( 1 . 5 +/- 0 . 06 mM ) , glutathione ( 1 . 5 +/- 0 . 07 mM ) , EDTA ( 100 +/- 0 . 02 mM ) and citric acid ( 186 +/- 0 . 16 mM ) .
 Chemical: l - cysteine; Chemical: ascorbic acid; Chemical: glutathione; Chemical: EDTA; Chemical: citric 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: l - cysteine; Chemical: ascorbic acid; Chemical: glutathione; Chemical: EDTA; Chemical: citric acid