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The present work highlights the critical importance of an intracyclic NH group at the 4 - position , as well as an exocyclic NH group linked to the 3 - position of the benzo - and pyridothiadiazine dioxides , for activity on KATP channels .
 Chemical: NH; Chemical: NH; Chemical: benzo - and pyridothiadiazine dioxides
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: NH; Chemical: NH; Chemical: benzo - and pyridothiadiazine dioxides