8515
Discovery of a new series of [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] quinoxalines as dual phosphodiesterase 2 / phosphodiesterase 10 ( PDE2 / PDE10 ) inhibitors .
 Chemical: [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] quinoxalines
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: [ 1 , 2 , 4 ] triazolo [ 4 , 3 - a ] quinoxalines