(4R,5R,8R,9S,12R,13R)-12,13-isopropylidenedioxy-9-mesyloxy-5,8-oxidotricosa-1,4-olide

(cis,4R,5R,8R,9R)-9-hydroxy-5,8-oxidotricosa-12-en-1,4-olide

(4R,5R,8R,9R,12R,13S)-13-hydroxy-5,8:9,12-diooxidotricosa-1,4-olide