(3aS,4R,7S,7aR)-7a-acetyl-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1(3H)-one

(3aS,4R,7S,7aR)-7a-acetyl-3a,4,7,7a-tetrahydro-4,7-methanoisobenzofuran-1(3H)-one

3-((1S)-1-hydroxyethyl)-2(5H)-furanone

(4R,5R)-dimethyl 2-(((3R,4S)-4-ethyl-5-oxotetrahydrofuran-3-yl)methyl)-1,3-dioxolane-4,5-dicarboxylate

{4-[1-Bromo-eth-(Z)-ylidene]-5-oxo-tetrahydro-furan-3-yl}-acetaldehyde