Mr = 258.0, monoclinic, P2₁/c, α = 9.418 (2), b =10.935 (4), c = 11.272 (2) Å, β = 116.31 (1)°, U = 1040.6 ų, Z = 4, D_m(at 273 K) = 1.609 (1), D_x (at 193 K) = 1.647 Mg m^-3, λ(Mo Kα) = 0.71069 Å, μ = 1.05 mm^-1, F(000) = 520. Final R = 0.031 for 1611 observed reflections. The five-membered ring of the tricyclo[4.1.0.0^2,4]heptane moiety is planar with the two cyclopropane rings fused in an anti configuration relative to each other. The geometry of the three-membered rings is consistent with the electronic effects induced by their respective substituents.