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Thioacetamide ( TA ) has long been known as a hepatotoxicant whose bioactivation requires S - oxidation to thioacetamide S - oxide ( TASO ) and then to the very reactive S , S - dioxide ( TASO2 ) .
 Chemical: Thioacetamide; Chemical: S; Chemical: thioacetamide S - oxide; Chemical: TASO; Chemical: S , S - dioxide; Chemical: TASO2
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: Thioacetamide; Chemical: S; Chemical: thioacetamide S - oxide; Chemical: TASO; Chemical: S , S - dioxide; Chemical: TASO2