Knutsen, Lars J. S.; Lau, Jesper; Petersen, Hans; Thomsen, Christian; Weis, Jan U.; Shalmi, Michael; Judge, Martin E.; Hansen, Anker Jon; Sheardown, Malcolm J. Journal of Medicinal Chemistry, 1999, vol. 42, # 18 p. 3463 - 3477 doi: 10.1021/jm960682u