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The rigid E - geometry of the exocyclic double bond allowed a more efficient binding conformation compared to more flexible and less active 2 - ( 1 - benzofuran - 3 - yl ) - N - methylacetamide isomers and 4 - N - methylcarboxamidomethylcoumarin analogues .
 Chemical: 2 - ( 1 - benzofuran - 3 - yl ) - N - methylacetamide; Chemical: 4 - N - methylcarboxamidomethylcoumarin
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: 2 - ( 1 - benzofuran - 3 - yl ) - N - methylacetamide; Chemical: 4 - N - methylcarboxamidomethylcoumarin