4443
In the present study , we have determined the NMR structure of EW29Ch in the sugar - free state and performed ( 15 ) N relaxation experiments for EW29Ch in both the sugar - free state and the lactose - bound states .
 Chemical: sugar; Chemical: ( 15 ) N; Chemical: sugar; Chemical: lactose
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: sugar; Chemical: ( 15 ) N; Chemical: sugar; Chemical: lactose