(3aS,7S,7aR)-4-bromo-7-(trimethylsilyl)-3a,6,7,7a-tetrahydro-1-benzofuran-2(3H)-one

(3S)-3-[(2R)-5-oxo-2,5-dihydrofuran-2-yl]-3-(trimethylsilyl)propanal

(5R)-5-[(1S)-4,4-dibromo-1-(trimethylsilyl)but-3-en-1-yl]furan-2(5H)-one

3-trimethylsilylprop-2-enal

(3aR,7S,7aR)-7-(trimethylsilyl)-4-vinyl-3a,6,7,7a-tetrahydro-1-benzofuran-2(3H)-one