(+)-Isoclavukerin

In 2002, Hans J. Schäfer and colleagues[1] reported a total synthesis route of (±)-clavukerin:

[1] Formal total synthesis of the trinorguaiane sesquiterpenes (+/−)-clavukerin A and (+/−)-isoclavukerin. Tetrahedron Letters. Volume 43, Issue 15, 8 April 2002, Pages 2683-2685. DOI:10.1016/S0040-4039(02)00402-1