7940
Four kinds of scaffolds , namely benzimidazole , benzothiazole , 3H - indazole , and 5 - phenyl - 1H - pyrazole , were designed and synthesized .
 benzimidazole, benzothiazole, 3H - indazole, 5 - phenyl - 1H - pyrazole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 benzimidazole, benzothiazole, 3H - indazole, 5 - phenyl - 1H - pyrazole