20438
MDL 11939 ( 1 . 0 mg / kg ) , a 5HT2A receptor antagonist , fully reversed the changes induced by DOI on HFO but only partially for the low gamma band .
 Chemical: MDL 11939; Chemical: DOI
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: MDL 11939; Chemical: DOI