19923
All the synthesized compounds showed significant vasodilation properties using isolated thoracic aortic rings of rats pre - contracted with norepinephrine hydrochloride standard technique .
 Chemical: norepinephrine hydrochloride
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: norepinephrine hydrochloride