InChI=1S/C20H20O5/c1-11(2)5-6-20-10-24-17-7-12(21)3-4-13(17)19(20)25-18-9-16(23)15(22)8-14(18)20/h3-5,7-9,19,21-23H,6,10H2,1-2H3/t19-,20-/m0/s1