4200
Unpremedicated patients were given fentanyl 1 microgram / kg followed by etomidate 0 . 3 mg / kg .
 Chemical: fentanyl; Chemical: etomidate
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 Chemical: fentanyl; Chemical: etomidate