Peregrinin

3-Oxomarrubiin

(2aR)-6-[2-(3-Furyl)ethyl]-2a,5,5a,6,7,8,8aα,8bα-octahydro-6α-hydroxy-2a,5aβ,7α-trimethyl-2H-naphtho[1,8-bc]furan-2,3(4H)-dione