α-Costal

(2R)-1,2,3,4,4a,5,6,8aβ-Octahydro-4aα,8-dimethyl-α-methylene-2-naphthaleneacetaldehyde

(2R)-α-Methylene-4aα,8-dimethyl-1,2,3,4,4a,5,6,8aβ-octahydronaphthalene-2α-acetaldehyde