(4R,5R,12R,13S)-5-hydroxytricosa-8,9-isopropylidenedioxy-8-en-1,4-olide

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

(4R,5R)-8-benzyloxy-5-(tert-butyldiphenylsilyloxy)octan-1,4-olide

(cis,4R,5R,12R,13S)-5-tert-butyldiphenylsilyloxytricosa-12,13-isopropylidenedioxy-8-en-1,4-olide