16319
The modifications observed by ( 1 ) H NMR , and the amounts of catabolites excreted by the parasites after treatment with the compounds , suggested that the catabolic mechanism could depend on the structure of the side chains linked to the aza - scorpiand macrocycles .
 Chemical: ( 1 ) H; Chemical: aza
Given options, please tell me the categories of all the listed entity words.Output format is "type1: word1; type2: word2". 
Option: Chemical 
Text: {0} 
 Entities: ( 1 ) H, aza 
Answer:
 Chemical: ( 1 ) H; Chemical: aza