(1R,2R,2'S,2''E,3S,4R,4''E,6S,6''S,6''E,8''R,10''S,12''E,14''R)-1-[3'-tert-butyldiphenylsilyloxy-2'-(8'',10'',12'',14''-tetramethylhexadeca-2'',4'',6'',12''-tetraenoylamino)propyl]-2,3-epoxy-6-hydroxy-4-(4-methylbenzenesulfonyl)cyclohexan-1-ol

(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

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