17598
A series of novel 2 - ( 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - yl ) - 4 - ( coumarin - 3 - yl ) thiazoles ( 6 ) were synthesized by condensing 3 - ( 2 - bromoacetyl ) coumarins ( 4 ) with various 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - thiocarboxamides ( 5 ) , obtained by the reaction of thiosemicarbazide with trifluoromethyl - beta - diketones .
 2 - ( 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - yl ) - 4 - ( coumarin - 3 - yl ) thiazoles, 3 - ( 2 - bromoacetyl ) coumarins, 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - thiocarboxamides, thiosemicarbazide, trifluoromethyl - beta - diketones
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 2 - ( 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - yl ) - 4 - ( coumarin - 3 - yl ) thiazoles, 3 - ( 2 - bromoacetyl ) coumarins, 5 - hydroxy - 5 - trifluoromethyl - 4 , 5 - dihydropyrazol - 1 - thiocarboxamides, thiosemicarbazide, trifluoromethyl - beta - diketones