InChI=1S/C22H20O5/c1-13(2)3-5-16-11-14(4-10-19(16)24)12-18-20(22(26)27-21(18)25)15-6-8-17(23)9-7-15/h3-4,6-11,23-24H,5,12H2,1-2H3