2790
They were given a ten day pretreatment with either L - alpha - GFC or placebo , p . o . , and on the eleventh day either scopolamine or placebo , i . m .
 L - alpha - GFC, scopolamine
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Disease, Chemical 
Text: {0} 
Answer:
 L - alpha - GFC, scopolamine