Showing structure for 2-[(1r)-3-methyl-1-(1-{[(2r,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}-4-{[(2s,3r,4s,5s,6r)-3,4,5-trihydroxy-6-(hydroxymethyl)oxan-2-yl]oxy}naphthalen-2-yl)but-2-en-1-yl]naphthalene-1,4-dione