17884
First synthesis and biological evaluation of indeno [ 2 , 1 - e ] pyrazolo [ 3 , 4 - b ] pyrazin - 5 - one and related derivatives .
 Chemical: indeno [ 2 , 1 - e ] pyrazolo [ 3 , 4 - b ] pyrazin - 5 - one
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