6295
Renal cancer was initiated by single intraperitoneal ( i . p . ) injection of N - nitrosodiethylamine ( DEN 200 mg / kg BW body weight ) and promoted by twice weekly administration of ferric nitrilotriacetate ( Fe - NTA ) 9 mg Fe / kg BW for 16 wk .
 Chemical: N - nitrosodiethylamine; Chemical: DEN; Chemical: ferric nitrilotriacetate; Chemical: Fe - NTA; Chemical: Fe
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 - nitrosodiethylamine; Chemical: DEN; Chemical: ferric nitrilotriacetate; Chemical: Fe - NTA; Chemical: Fe