18923
A library of novel 5 - amino - 2 , 7 - diaryl - 2 , 3 - dihydrobenzo [ b ] thiophene - 4 , 6 - dicarbonitriles have been synthesized regioselectively in good yields through the one - pot domino reactions of 5 - aryldihydro - 3 ( 2H ) - thiophenones , malononitrile and aromatic aldehydes in the presence of morpholine .
 Chemical: 5 - amino - 2 , 7 - diaryl - 2 , 3 - dihydrobenzo [ b ] thiophene - 4 , 6 - dicarbonitriles; Chemical: 5 - aryldihydro - 3 ( 2H ) - thiophenones; Chemical: malononitrile; Chemical: aromatic aldehydes; Chemical: morpholine
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: 5 - amino - 2 , 7 - diaryl - 2 , 3 - dihydrobenzo [ b ] thiophene - 4 , 6 - dicarbonitriles; Chemical: 5 - aryldihydro - 3 ( 2H ) - thiophenones; Chemical: malononitrile; Chemical: aromatic aldehydes; Chemical: morpholine