20563
This gastroprotective effect was attenuated by N ( G ) - nitro - l - arginine methyl ester , indomethacin and N - ethylmaleimide , indicating that NO , prostaglandins and sulfhydryl groups are involved in the mechanisms of action .
 Chemical: N ( G ) - nitro - l - arginine methyl ester; Chemical: indomethacin; Chemical: N - ethylmaleimide; Chemical: NO; Chemical: prostaglandins; Chemical: sulfhydryl
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: N ( G ) - nitro - l - arginine methyl ester; Chemical: indomethacin; Chemical: N - ethylmaleimide; Chemical: NO; Chemical: prostaglandins; Chemical: sulfhydryl