InChI=1S/C17H20O6/c1-8-5-6-17(23-20)9(2)7-12(21-11(4)18)13-10(3)16(19)22-15(13)14(8)17/h5,12-15,20H,2-3,6-7H2,1,4H3/t12-,13+,14+,15-,17+/m0/s1