hardwickic acid

(4aS)-5α-[2-(3-Furyl)ethyl]-3,4,4aα,5,6,7,8,8a-octahydro-5,6β,8aβ-trimethyl-1-naphthalenecarboxylic acid

(4aα)-3,4,4a,5,6,7,8,8a-Octahydro-5α-[2-(3-furanyl)ethyl]-5,6β,8aβ-trimethylnaphthalene-1-carboxylic acid