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In conclusion , although equimolar doses were used , expecting similar levels of GHB in the body , 1 , 4 - BD and GBL shared only some of the in vivo effects of GHB .
 GHB, 1 , 4 - BD, GBL, GHB
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 GHB, 1 , 4 - BD, GBL, GHB