15259
A new series of thieno [ 2 ' , 3 ' : 4 , 5 ] pyrimido [ 1 , 2 - b ] [ 1 , 2 , 4 ] triazines and thieno [ 2 , 3 - d ] [ 1 , 2 , 4 ] triazolo [ 1 , 5 - a ] pyrimidines was synthesized .
 Chemical: thieno [ 2 ' , 3 ' : 4 , 5 ] pyrimido [ 1 , 2 - b ] [ 1 , 2 , 4 ] triazines; Chemical: thieno [ 2 , 3 - d ] [ 1 , 2 , 4 ] triazolo [ 1 , 5 - a ] pyrimidines
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: thieno [ 2 ' , 3 ' : 4 , 5 ] pyrimido [ 1 , 2 - b ] [ 1 , 2 , 4 ] triazines; Chemical: thieno [ 2 , 3 - d ] [ 1 , 2 , 4 ] triazolo [ 1 , 5 - a ] pyrimidines