InChI=1S/C20H26O5/c1-6-13(4)19(22)24-16-9-11(2)7-15(21)8-12(3)10-17-18(16)14(5)20(23)25-17/h6-7,10,15-18,21H,5,8-9H2,1-4H3/b11-7+,12-10+,13-6+/t15-,16-,17+,18-/m0/s1