6051
N , N - dihydroxypyromellitimide ( NDHPI ) and N , N ' , N ' ' - trihydroxyisocyanuric acid ( THICA ) have been recently demonstrated to act as better carbon - radical - producing catalysts than the popular N - hydroxyphthalimide ( NHPI ) .
 Chemical: N , N - dihydroxypyromellitimide; Chemical: NDHPI; Chemical: N , N ' , N ' ' - trihydroxyisocyanuric acid; Chemical: THICA; Chemical: carbon; Chemical: N - hydroxyphthalimide; Chemical: NHPI
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 , N - dihydroxypyromellitimide; Chemical: NDHPI; Chemical: N , N ' , N ' ' - trihydroxyisocyanuric acid; Chemical: THICA; Chemical: carbon; Chemical: N - hydroxyphthalimide; Chemical: NHPI