121923-96-4 Ecklonialactone B Oxireno(3,4)cyclopent(1,2-c)oxacyclotetradecin-5(2H)-one, 3-ethyl-1a,2a,3,6,7,8,9,10,11,12,14a,14b-dodecahydro-, (1aS-(1aR*,2aS*,3R*,13Z,14aR*,14bS*))-