16029
A large number of aromatic / heterocyclic sulfonamides and some 5 - mercapto - 1 , 3 , 4 - thiadiazoles were investigated as TcCA inhibitors .
 Chemical: aromatic / heterocyclic sulfonamides; Chemical: 5 - mercapto - 1 , 3 , 4 - thiadiazoles
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: aromatic / heterocyclic sulfonamides; Chemical: 5 - mercapto - 1 , 3 , 4 - thiadiazoles