9(R)-11-((2'S,8'S,10'S,11'R)-2',8'-dihydroxy-7'-oxo-11'-((Z)-2-pentenyl)-9'-oxa-4'-azatricyclo(6.3.1.0(1.5))dodec- 5'en-10'-yl)-9-hydroxy-10-oxoundecanoic acid
9(r)-11-((2's,8's,10's,11'r)-2',8'-dihydroxy-7'-oxo-11'-((z)-2-pentenyl)-9'-oxa-4'-azatricyclo(6.3.1.0(1.5))dodec- 5'en-10'-yl)-9-hydroxy-10-oxoundecanoic acid