InChI=1/C20H16O4/c1-24-19(22)10-8-13-7-9-15-17(11-13)16(12-18(21)20(15)23)14-5-3-2-4-6-14/h2-7,9,11-12H,8,10H2,1H3 FC2C60B54A033363