20551
Abacavir - derived Edman adducts with the N - terminal valine of hemoglobin were analyzed by an established liquid chromatography - electrospray ionization - tandem mass spectrometry method .
 Chemical: Abacavir; Chemical: N; Chemical: valine
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: Abacavir; Chemical: N; Chemical: valine