General diastereoselective synthetic approach toward isospongian diterpenes. Synthesis of (-)-marginatafuran, (-)-marginatone, and (-)-20-acetoxymarginatone

1. Gris, A.
2. Cabedo, N.
3. Navarro, I.
4. De Alfonso, I.
5. Agulló, C.
6. Abad-Somovilla, A.