12782
Metabolism via N - oxidation was predominant in dog and rat , while in monkey and human , metabolism proceeded primarily via oxidation of indole - containing moiety .
 Chemical: N; Chemical: indole
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: N; Chemical: indole