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2 . In this article , we illustrate the use of such an experimental model to study the nephrotoxic effects of ( i ) chloroacetaldehyde , a metabolite of the anticancer drug ifosfamide , ( ii ) of cobalt chloride , a potential leakage product of the cobalt - containing nanoparticles , and ( iii ) of valproate , a widely used antiepileptic drug .
 chloroacetaldehyde, ifosfamide, cobalt chloride, cobalt, valproate
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 chloroacetaldehyde, ifosfamide, cobalt chloride, cobalt, valproate