10240
The discriminative stimulus effects of rac - BHFF were not antagonized by the GABA ( B ) receptor antagonist 3 - aminopropyl ( diethoxymethyl ) phosphinic acid ( CGP35348 ) but were attenuated by the less efficacious GABA ( B ) receptor - positive modulator 2 , 6 - di - tert - butyl - 4 - ( 3 - hydroxy - 2 , 2 - dimethylpropyl ) phenol ( CGP7930 ) , suggesting the possibility that rac - BHFF produces its discriminative stimulus effects by directly activating GABA ( B2 ) subunits of GABA ( B ) receptors .
 Chemical: rac - BHFF; Chemical: GABA; Chemical: 3 - aminopropyl ( diethoxymethyl ) phosphinic acid; Chemical: CGP35348; Chemical: GABA; Chemical: 2 , 6 - di - tert - butyl - 4 - ( 3 - hydroxy - 2 , 2 - dimethylpropyl ) phenol; Chemical: CGP7930; Chemical: rac - BHFF; Chemical: GABA; Chemical: GABA
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: rac - BHFF; Chemical: GABA; Chemical: 3 - aminopropyl ( diethoxymethyl ) phosphinic acid; Chemical: CGP35348; Chemical: GABA; Chemical: 2 , 6 - di - tert - butyl - 4 - ( 3 - hydroxy - 2 , 2 - dimethylpropyl ) phenol; Chemical: CGP7930; Chemical: rac - BHFF; Chemical: GABA; Chemical: GABA