InChI=1S/C19H18O6/c20-18(21)14(8-12-4-2-1-3-5-12)15(19(22)23)9-13-6-7-16-17(10-13)25-11-24-16/h1-7,10,14-15H,8-9,11H2,(H,20,21)(H,22,23)/t14-,15-/m0/s1