21394
Ionic liquid [ HMIM ] HSO4 was found to be an efficient catalyst for the synthesis of N - substituted pyrroles through the reaction of 2 , 5 - hexanedione with amines under ultrasonic irradiation at room temperature .
 Chemical: [ HMIM ] HSO4; Chemical: N - substituted pyrroles; Chemical: 2 , 5 - hexanedione; Chemical: amines
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: [ HMIM ] HSO4; Chemical: N - substituted pyrroles; Chemical: 2 , 5 - hexanedione; Chemical: amines