9874
In the present study , we investigated the scavenging activity of Neu2000 on various classes of reactive oxygen species and reactive nitrogen species ( ROS / RNS ) as well as its efficacy for reducing free radicals and oxidative stress / damage induced in spinal cord mitochondrial preparations .
 Chemical: Neu2000; Chemical: oxygen; Chemical: nitrogen
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: Neu2000; Chemical: oxygen; Chemical: nitrogen