3475
Buspirone and its major metabolites 1 - ( 2 - pyrimidinyl ) piperazine and 6 ' - hydroxybuspirone were determined using a newly validated UPLC - MS / MS method .
 Chemical: Buspirone; Chemical: 1 - ( 2 - pyrimidinyl ) piperazine; Chemical: 6 ' - hydroxybuspirone
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: Buspirone; Chemical: 1 - ( 2 - pyrimidinyl ) piperazine; Chemical: 6 ' - hydroxybuspirone