23764
Synthesis , characterization and organic field effect transistor performance of a diketopyrrolopyrrole - fluorenone copolymer .
 Chemical: diketopyrrolopyrrole; Chemical: fluorenone
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: diketopyrrolopyrrole; Chemical: fluorenone