(1S,2S)-1-{2-[(4-Methoxy­benzyl)­oxy]­ethyl}-2-methyl-3-butenyl (1S,4R)-4,7,7-tri­methyl-3-oxo-2-oxabi­cyclo­[2.2.1]­heptane-1-carboxyl­ate

The title compound, C₂₅H₃₄O₆, crystallizes in the ortho­rhombic space group P2₁2₁2₁. The crystal structure has been determined to establish the absolute configuration of the parent compound by introducing a chiral auxiliary of known structure.