Oxygenated Sesquiterpenes From the Indo-Pacific Nudibranch Ardeadoris rubroannulata: Structure Revision of Pu’ulenal.

Seven oxygenated sesquiterpenes 1 to 7 each with a drimane framework were isolated from an organic extract of the nudibranch Ardeadoris rubroannulata collected from Eastern Australia. The structure of pu’ulenal 2 was revised by 1D NOESY, providing a 9Z configuration, while isopu’ulenal 3 has the 9E configuration previously ascribed to pu’ulenal. [ABSTRACT FROM AUTHOR]