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Native cellulose nanofibrils , purified from wood and sea tunicate , were fully dispersed in water via a topochemical modification of cellulose nanofibrils using 2 , 2 , 6 , 6 - tetramethylpiperidinyl - 1 - oxyl ( TEMPO ) as a catalyst .
 Chemical: 2 , 2 , 6 , 6 - tetramethylpiperidinyl - 1 - oxyl; Chemical: TEMPO
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: 2 , 2 , 6 , 6 - tetramethylpiperidinyl - 1 - oxyl; Chemical: TEMPO