4968
However , intracellular mechanisms of the H ( 2 ) S - induced vasodilation and its interactions with other endothelium - derived relaxing factors , such as nitric oxide ( NO ) , remain unclear .
 Chemical: H ( 2 ) S; Chemical: nitric oxide; Chemical: NO
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: H ( 2 ) S; Chemical: nitric oxide; Chemical: NO