26845
These compounds were low potency ( 1 ) h5 - HT1A receptor partial agonists , ( 2 ) h5 - HT2A receptor antagonists , ( 3 ) weak h5 - HT2C receptor antagonists .
 None
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:  
Answer:
 None