OC(=O)C(=C1/OC(=O)C(=C1O)C1=CC(O)=C2OC(=O)C3=CC(=CC1=C23)C1C(=O)O\C(=C(/C(O)=O)C2=CC=C(O)C=C2)C1=O)\C1=CC=C(O)C=C1