8901
Synthesis of new N - ( arylcyclopropyl ) acetamides and N - ( arylvinyl ) acetamides as conformationally - restricted ligands for melatonin receptors .
 Chemical: N - ( arylcyclopropyl ) acetamides; Chemical: N - ( arylvinyl ) acetamides; Chemical: melatonin
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: N - ( arylcyclopropyl ) acetamides; Chemical: N - ( arylvinyl ) acetamides; Chemical: melatonin