16493
After vaginal administration , 2 - butyl acetate , 2 - pentyl acetate , and metabolites were observed in breath , whereas isopropyl butyrate , 2 - pentyl butyrate , and metabolites were not .
 Chemical: 2 - butyl acetate; Chemical: 2 - pentyl acetate; Chemical: isopropyl butyrate; Chemical: 2 - pentyl butyrate
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: 2 - butyl acetate; Chemical: 2 - pentyl acetate; Chemical: isopropyl butyrate; Chemical: 2 - pentyl butyrate