(1aα,1bβ,2α,7α,7aβ,7bα)-1a,1b,2,7,7a,7b-hexahydro-2,7-epoxynaphtho<2',3':3,4>cyclobuta<1,2-b>oxiren

(1α,1aα,2α,7α,7aα)-1a,2,7,7a-tetrahydro-2,7-epoxy-1H-cyclopropa-naphthalene-1-carbaldehyde