24093
The selective NK1 antagonist orvepitant ( GW823296 ) was used to test this hypothesis .
 Chemical: orvepitant; Chemical: GW823296
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: orvepitant, GW823296 
Answer:
 Chemical: orvepitant; Chemical: GW823296