149633-56-7 Ecklonialactone E Oxireno(3,4)cyclopent(1,2-c)oxacyclohexadecin-5(2H)-one, 3-ethyl-1a,2a,3,6,7,8,11,14,16a,16b-decahydro-, (1aS-(1aR*,2aS*,3R*,9Z,12Z,15Z,16aR*,16bS*))-