8633
Pretreatment with the nitric oxide inhibitor N ( G ) - nitro - l - arginine methyl ester ( l - NAME ) reduced the locomotor activating effects of paraxanthine , but not caffeine .
 Chemical: nitric oxide; Chemical: N ( G ) - nitro - l - arginine methyl ester; Chemical: l - NAME; Chemical: paraxanthine; Chemical: caffeine
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: nitric oxide; Chemical: N ( G ) - nitro - l - arginine methyl ester; Chemical: l - NAME; Chemical: paraxanthine; Chemical: caffeine