29884
The first subgroup served as AD control ; the second one , which served as positive control , was treated orally with the conventional therapy for AD ( rivastigmine ) at a dose of 0 . 3 mg / kg body weight ( b . w . ) daily for 3 months .
 rivastigmine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 rivastigmine