18848
This review discusses the different classes of cholinesterase inhibitors including tacrine , donepezil , rivastigmine , galantamine , xanthostigmine , para - aminobenzoic acid , coumarin , flavonoid , and pyrrolo - isoxazole analogues developed for the treatment of AD .
 tacrine, donepezil, rivastigmine, galantamine, xanthostigmine, para - aminobenzoic acid, coumarin, flavonoid, pyrrolo - isoxazole
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 tacrine, donepezil, rivastigmine, galantamine, xanthostigmine, para - aminobenzoic acid, coumarin, flavonoid, pyrrolo - isoxazole