17484
When the conjugated thiophene backbone was extended with terminal carboxyl groups , the LCO revealed striking spectral differences between distinct protein inclusion bodies .
 Chemical: thiophene; Chemical: carboxyl
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: thiophene; Chemical: carboxyl