(12E)-(7S,9R,10S)-7-[(2E)-3-(carboallyloxy)prop-2-enyl]-4,9-dihydroxy-10-methyl-7,8,9,10,11,14-hexahydro-6-oxa-benzocyclodecen-5-one

(12E)-(7S,9R,10S)-4,9-bis-(tert-butyldimethylsilyloxy)-7-[(2E)-3-(carboallyloxy)prop-2-enyl]-10-methyl-7,8,9,10,11,14-hexahydro-6-oxa-benzocyclodecen-5-one

1-bromo-hex-3-en-1-yne