3996
Open framework [ Ni ( L ( R , R ) ) ] ( 3 ) [ C ( 6 ) H ( 3 ) ( COO ) ( 3 ) ] ( 2 ) ( 2 ) was constructed from the self - assembly of compound 1 with deprotonated 1 , 3 , 5 - benzenetricarboxylic acid , BTC ( 3 - ) .
 Chemical: [ Ni ( L ( R , R ) ) ] ( 3 ) [ C ( 6 ) H ( 3 ) ( COO ) ( 3 ) ] ( 2 ); Chemical: 1 , 3 , 5 - benzenetricarboxylic acid; Chemical: BTC ( 3 - )
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: [ Ni ( L ( R , R ) ) ] ( 3 ) [ C ( 6 ) H ( 3 ) ( COO ) ( 3 ) ] ( 2 ); Chemical: 1 , 3 , 5 - benzenetricarboxylic acid; Chemical: BTC ( 3 - )