15334
Both gender - and strain - related differences in respiratory effects of BUP could be attributed to BUP itself rather than to its metabolite , NBUP .
 Chemical: BUP; Chemical: BUP; Chemical: NBUP
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: BUP; Chemical: BUP; Chemical: NBUP