| 2-methyl-7-oxo-5-norbornene-2-carboxaldehyd bis(dimethyl acetal) |
| 2-methyl-2-(dimethoxymethyl)-7,7-dimethoxy-5-norbornene |
| 2-methyl-7-oxo-5-norbornene-2-carboxaldehyde bis(dimethyl acetal) |
| 2-methyl-7-oxo-5-norbornene-2-carboxaldehydbis(dimethyl acetal) |
