2684
A phase I , open - label , single - dose , mass balance study of 14C - labeled abiraterone acetate in healthy male subjects .
 Chemical: 14C - labeled abiraterone acetate
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: 14C - labeled abiraterone acetate