InChI=1S/C20H20O5/c1-9-6-10-8-14-20(23)17(15(10)12(21)7-9)18(25-14)11-4-3-5-13(24-2)16(11)19(20)22/h3-7,14,17-19,21-23H,8H2,1-2H3/t14-,17-,18-,19+,20+/m0/s1