Structure−Activity Studies of Orexin A and Orexin B at the Human Orexin 1 and Orexin 2 Receptors Led to Orexin 2 Receptor Selective and Orexin 1 Receptor Preferring LigandsManja Lang, Annette G. Beck‐Sickinger, Franz Dürrenberger et al.|Journal of Medicinal Chemistry|2004Cited by 84