17885
The synthesis of indeno [ 2 , 1 - e ] pyrazolo [ 3 , 4 - b ] pyrazin - 5 - one was achieved by intramolecular Friedel - Crafts reaction of the acid chloride 3 - methyl - 1 , 6 - diphenyl - 1H - pyrazolo [ 3 , 4 - b ] pyrazine - 5 - carboxylic acid chloride ( 4 ) using AlCl3 in boiling CS2 .
 Chemical: indeno [ 2 , 1 - e ] pyrazolo [ 3 , 4 - b ] pyrazin - 5 - one; Chemical: acid chloride; Chemical: 3 - methyl - 1 , 6 - diphenyl - 1H - pyrazolo [ 3 , 4 - b ] pyrazine - 5 - carboxylic acid chloride; Chemical: AlCl3; Chemical: CS2
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: indeno [ 2 , 1 - e ] pyrazolo [ 3 , 4 - b ] pyrazin - 5 - one; Chemical: acid chloride; Chemical: 3 - methyl - 1 , 6 - diphenyl - 1H - pyrazolo [ 3 , 4 - b ] pyrazine - 5 - carboxylic acid chloride; Chemical: AlCl3; Chemical: CS2