InChI=1S/C21H22O5/c1-11(2)4-6-14-19(23)18(24-3)9-15-16-10-25-17-8-12(22)5-7-13(17)20(16)26-21(14)15/h4-5,7-9,16,20,22-23H,6,10H2,1-3H3/t16-,20-/m0/s1