18829
Tadalafil and acebutolol ( internal standard ) were extracted by liquid - liquid extraction with tert - butyl methyl ether .
 Chemical: Tadalafil; Chemical: acebutolol; Chemical: tert - butyl methyl ether
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: Tadalafil, acebutolol, tert - butyl methyl ether 
Answer:
 Chemical: Tadalafil; Chemical: acebutolol; Chemical: tert - butyl methyl ether