2692
The main metabolite excreted in urine was N - oxide abiraterone sulfate ( 4 . 22 % of TR ) .
 Chemical: N - oxide abiraterone sulfate
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: N - oxide abiraterone sulfate