Showing structure for OC1C2OC(=O)C3=CC(O)=C(O)C4=C3C3C(=CC(=O)C(O)(O4)C3(O)O)C(=O)OC1C1OC2COC(=O)C2=C(C(O)=C(O)C(O)=C2)C2=C(O)C(O)=C(O)C=C2C1=O