10518
Optically pure compound 8k was obtained by a single recrystallization from acetone and its further elaboration through Friedlander condensation afforded compound 5 .
 Chemical: acetone
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: acetone