28697
The current study examined the bioactivation potential of ghrelin receptor inverse agonists , 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( imidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone ( 1 ) and 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( 2 - methylimidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone ( 2 ) , containing a fused imidazo [ 2 , 1 - b ] thiazole motif in the core structure .
 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( imidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone, 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( 2 - methylimidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone, imidazo [ 2 , 1 - b ] thiazole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( imidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone, 1 - ( 2 - ( 2 - chloro - 4 - ( 2H - 1 , 2 , 3 - triazol - 2 - yl ) benzyl ) - 2 , 7 - diazaspiro [ 3 . 5 ] nonan - 7 - yl ) - 2 - ( 2 - methylimidazo [ 2 , 1 - b ] thiazol - 6 - yl ) ethanone, imidazo [ 2 , 1 - b ] thiazole