11546
We used a sensitive liquid chromatography - mass spectrometry ( LC / MS ) and LC / MS / MS method to show that L - tyrosine ( Tyr ) , an amino acid with a highly reactive hydroxyl group , readily reacts with cigarette smoke extract ( CSE ) at body temperature ( 37 degrees C ) to form various Tyr derivatives .
 Chemical: L - tyrosine; Chemical: Tyr; Chemical: amino acid; Chemical: hydroxyl; Chemical: Tyr
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 - tyrosine; Chemical: Tyr; Chemical: amino acid; Chemical: hydroxyl; Chemical: Tyr