Einecs 258-329-2

(5Z,9S,11R,13E,15S)-11,15-Bis(1-ethoxyethyloxy)-9-hydroxyprosta-5,13-dien-1-oic acid

(5Z,13E,15S)-11alpha,15-bis(1-ethoxyethoxy)-9alpha-hydroxyprosta-5,13-dien-1-oic acid