3290
Unchanged drug and a carboxylate metabolite ( M1 ) were the major components in plasma , accounting for 66 . 0 and 23 . 4 % of total plasma radioactivity area under the curve , respectively .
 Chemical: carboxylate
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: carboxylate