18017
The second enzymatic system oxidizes nicotinamide to nicotinamide N - oxide .
 Chemical: nicotinamide; Chemical: nicotinamide N - oxide
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: nicotinamide; Chemical: nicotinamide N - oxide