15322
While most deaths from asphyxia related to buprenorphine ( BUP ) overdose have been reported in males , higher plasma concentrations of BUP and its toxic metabolite norbuprenorphine ( NBUP ) have been observed in females .
 Chemical: buprenorphine; Chemical: BUP; Chemical: BUP; Chemical: norbuprenorphine; 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: buprenorphine; Chemical: BUP; Chemical: BUP; Chemical: norbuprenorphine; Chemical: NBUP