6773
The concentration - response was markedly decreased in the presence of excess GSH ; the nitric oxide scavenger 2 - ( 4 - carboxyphenyl ) - 4 , 4 , 5 , 5 - tetramethylimidazoline - 1 - oxyl - 3 - oxide had no effect .
 Chemical: GSH; Chemical: nitric oxide; Chemical: 2 - ( 4 - carboxyphenyl ) - 4 , 4 , 5 , 5 - tetramethylimidazoline - 1 - oxyl - 3 - oxide
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: GSH; Chemical: nitric oxide; Chemical: 2 - ( 4 - carboxyphenyl ) - 4 , 4 , 5 , 5 - tetramethylimidazoline - 1 - oxyl - 3 - oxide