[1]Patent:CN103635456,2016,B.Locationinpatent:Paragraph0387-0389
Title: Discovery of novel spirocyclic inhibitors of fatty acid amide hydrolase (FAAH). Part 2. Discovery of 7-azaspiro[3.5]nonane urea PF-04862853, an orally efficacious inhibitor of fatty acid amide hydrolase (FAAH) for pain.
Journal: Bioorganic & medicinal chemistry letters 20111101
Title: Discovery of novel spirocyclic inhibitors of fatty acid amide hydrolase (FAAH). Part 1: identification of 7-azaspiro[3.5]nonane and 1-oxa-8-azaspiro[4.5]decane as lead scaffolds.
Journal: Bioorganic & medicinal chemistry letters 20111101