(7E, 9E, 11Z, 14Z)-(5S, 6S)-5, 6-Epoxyeicosa-7, 9,11, 14-tetraenoate (7E, 9E, 11Z, 14Z)-(5S, 6S)-5, 6-Epoxyicosa-7, 9,11, 14-tetraenoate 72059-45-1 LEUKOTRIENE-A4 LTA4