5769
Discovery of a selective M 4 positive allosteric modulator based on the 3 - amino - thieno [ 2 , 3 - b ] pyridine - 2 - carboxamide scaffold : development of ML253 , a potent and brain penetrant compound that is active in a preclinical model of schizophrenia .
 Chemical: 3 - amino - thieno [ 2 , 3 - b ] pyridine - 2 - carboxamide; Chemical: ML253
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: 3 - amino - thieno [ 2 , 3 - b ] pyridine - 2 - carboxamide; Chemical: ML253