23761
Finally , working at slightly greater than LD50 NaCN doses , it was fortuitously discovered that ( i ) anesthesia leads to significantly prolonged survival compared to that of unanesthetized animals and that ( ii ) the antidotal activity of nitrite anion was completely abolished under anesthesia .
 Chemical: NaCN; Chemical: nitrite
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: NaCN; Chemical: nitrite