4005
Ethyl acetate ( ethyl ethanoate ) was crystallized in situ and the crystal structure was determined .
 Chemical: Ethyl acetate; Chemical: ethyl ethanoate
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: Ethyl acetate; Chemical: ethyl ethanoate