Design, synthesis, and structure–activity relationships of indole-3-heterocycles as agonists of the CB1 receptor - Morrison, Angus J.; Adam, Julia M.; Baker, James A.; Campbell, Robert A.; Clark, John K.; Cottney, Jean E.; Deehan, Maureen; Easson, Anna-Marie; Fields, Ruth; Francis, Stuart; Jeremiah, Fiona; Keddie, Neil; et al. (Bioorganic & Medicinal Chemistry Letters, 2011)