17072
The most potent N3 - substituent was 5 - chlorothiophene - 2 - sulfonamide .
 Chemical: 5 - chlorothiophene - 2 - sulfonamide
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: 5 - chlorothiophene - 2 - sulfonamide