4047
In search of a next generation molecule to the novel wake - promoting agent modafinil , a series of aryl - heteroayl - derived wakefulness enhancing agents ( in rats ) was developed .
 Chemical: modafinil
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: modafinil