The title compound is separated from the ginkgo hairy root culture. This compound (C 11 H 10 O 5, M r=222.19), crystallizes in the monoclinic system, space group P2 1/n, with cell parameters: a=9.571(2), b=12.411(2), c=16.934(3), β=101.92(3)°, V=1968.4 3, Z=8, D c=1.499g/cm 3; F(000)=928.0, MoKα radiation, λ=0.71013 , R=0.051 and wR=0.115 for 1605 independent reflections with I4σ (I). In the molecule, the aromatic and lactone rings are coplanar nearly. One of the two methoxyls is almost coplanar, but another one deviates from the molecular plane. There are intermolecular hydrogen bonds in the crystal. This compound is separated from the ginkgo hairy root culture. This compound (C 11 H 10 O 5, M r = 222.19) crystallizes in the monoclinic system space group P2 1 / n with cell parameters: a = 9.571 (2 , b = 12.411 (2), c = 16.934 (3) β, β = 101.92 (3) °, V = 1968.43, Z = 8, DC = 1.499g / cm3; , MoKα radiation, λ = 0.71013 , R = 0.051 and wR = 0.115 for 1605 independent reflections with I4σ (I). In the molecule, the aromatic and lactone rings are coplanar nearly. One of the two methoxyls is almost coplanar, but another one deviates from the molecular plane. There are intermolecular hydrogen bonds in the crystal.