... Bioorganic & Medicinal Chemistry Letters. ... 16, 17, 18, 19 and 20 More specifically, several melatonin ligands of existing chemical series related to our work, such as phenylalkyl amides 1 21 and 2, 22 N-(substituted-anilinoethyl)amide 3, 23 and aminopyrrolidine derivatives 4 ...