InChI=1S/C20H18O5/c1-19(2)6-5-11-7-14-17(9-15(11)25-19)24-18-13-4-3-12(21)8-16(13)23-10-20(14,18)22/h3-9,18,21-22H,10H2,1-2H3/t18-,20+/m1/s1