25774
Our study demonstrates the key structural elements that confer inhibitory activity and highlights the requirement for electron - donating moieties off the C - 4 aryl moiety of the 2 - amino - 3 - carboxy - 4 - phenylthiophene backbone .
 Chemical: 2 - amino - 3 - carboxy - 4 - phenylthiophene
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: 2 - amino - 3 - carboxy - 4 - phenylthiophene