17108
This work resulted in the discovery of the 5 - morpholino - 7H - thieno [ 3 , 2 - b ] pyran - 7 - one system as the foundation of a new compound class of potential PI3K inhibitors having improved potency toward PI3K .
 Chemical: 5 - morpholino - 7H - thieno [ 3 , 2 - b ] pyran - 7 - 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: 5 - morpholino - 7H - thieno [ 3 , 2 - b ] pyran - 7 - one