19323
The NMR , IR , and computational analyses suggest that phenol - type tautomers of the pyrazolone ring are the active pharmacophore with the arylazanylpyrazolone analogues .
 phenol, pyrazolone, arylazanylpyrazolone
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 phenol, pyrazolone, arylazanylpyrazolone