Confertifolin

(5aS)-4,5,5a,6,7,8,9,9a-Octahydro-6,6,9aβ-trimethylnaphtho[1,2-c]furan-3(1H)-one

(5aS)-6,6,9aβ-Trimethyl-4,5,5aα,6,7,8,9,9a-octahydronaphtho[1,2-c]furan-3(1H)-one