... 1195 5,6=Methanoleukotriene A,. A Stable and Biologically Active Analogue of Leukotriene A, By KYRIACOS C. NICOLAOU,* NICOS A. PETASIS, and STEVEN P. SEITZ (Department of Ch.emistry, University of Pennsylvania, Philadelphia, Pennsylvania 19104) ... Chem. SOC., 1980, J. Rokach, RN Young, M. Kakushima, C.-K. Lau, R. Seguin, R. Frenette, and Y . Guindon, Tetrahedron Lett., 1981, 22, 979. M. Rosenberger and C. Neukom, J. Am. Chem. ...