(2E,4E,6E,12E)-(8R,10S,14R)-8,10,12,14-( tetramethyl)hexadeca-2,4,6,12-tetraenoic acid

(1S,2R,4S,5R,6S)-5-((S)-2-amino-3-((tert-butyldiphenylsilyl)oxy)propyl)-4,5-dihydroxy-7-oxabicyclo[4.1.0]heptan-2-yl acetate

(3S,5S,10S)-3-benzyloxycarbonylamino-10-triethylsilyloxy-1-oxaspiro[4,5]dec-6-ene-2,8-dione

(3S,5S,8R,10S)-3-benzyloxycarbonylamino-8-hydroxy-10-triethylsilyloxy-1-oxaspiro[4,5]dec-6-en-2-one

(3S,5S,6R,7R,8R,10S)-3-benzyloxycarbonylamino-6,7-epoxy-8-hydroxy-10-triethylsilyloxy-1-oxaspiro[4,5]dec-6-en-2-one