23264
Voltage - clamp electrophysiology studies of alpha 1 beta 2M286C gamma 2L receptors show that GABA is an efficacious agonist , and etomidate modulates GABA - activated activity , but direct etomidate agonism is absent .
 Chemical: GABA; Chemical: etomidate; Chemical: GABA; Chemical: etomidate
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: GABA, etomidate, GABA, etomidate 
Answer:
 Chemical: GABA; Chemical: etomidate; Chemical: GABA; Chemical: etomidate