magnolialide

(3aS)-3a,4,5,5a,6,7,8,9bα-Octahydro-3-methylene-5aα,9-dimethyl-6α-hydroxynaphtho[1,2-b]furan-2(3H)-one

(3aS)-3aβ,4,5,5a,6,7,8,9bα-Octahydro-6α-hydroxy-5aα,9-dimethyl-3-methylenenaphtho[1,2-b]furan-2(3H)-one