12912
The quinazolinon derivatives in this study can serve as new lead structure for the development of novel male contraceptives .
 Chemical: quinazolinon
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: quinazolinon 
Answer:
 Chemical: quinazolinon