25920
We conclude that these compounds are convenient templates for the design of useful drugs in to treat Alzheimer ' s disease ( AD ) , a pathology characterized by extensive oxidative stress and inflammation , thus essentially affected by reactive oxygen species ( ROS ) .
 Chemical: oxygen
Please list all entity words in the text that fit the category.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
Answer:
 Chemical: oxygen