5217
The carboxamide derivatives 6c and 6e exhibitted good inhibition on NB4 cancer cells , and the IC ( 50 ) values of which were 0 . 82 micro M and 0 . 96 micro M , respectively , much lower than 5 . 01 micro M of the positive control As ( 2 ) O ( 3 ) .
 Chemical: carboxamide; Chemical: As ( 2 ) O ( 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: carboxamide; Chemical: As ( 2 ) O ( 3 )