20045
The small molecule fusion inhibitors N - ( 4 - carboxy - 3 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole ( NB - 2 ) and N - ( 3 - carboxy - 4 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole ( A12 ) target a hydrophobic pocket of HIV - 1 gp41 and have moderate anti - HIV - 1 activity .
 N - ( 4 - carboxy - 3 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole, NB - 2, N - ( 3 - carboxy - 4 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole, A12
Please list all entity words in the text that fit the category. Output format is "word1, word2". 
Option: Chemical 
Text: {0} 
Answer:
 N - ( 4 - carboxy - 3 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole, NB - 2, N - ( 3 - carboxy - 4 - hydroxyphenyl ) - 2 , 5 - dimethylpyrrole, A12