23154
The antithrombotics of the tetrahydrothienopyridine series , clopidogrel and prasugrel , are prodrugs that must be metabolized in two steps to become pharmacologically active .
 Chemical: tetrahydrothienopyridine; Chemical: clopidogrel; Chemical: prasugrel
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: tetrahydrothienopyridine; Chemical: clopidogrel; Chemical: prasugrel