InChI=1S/C18H20O7/c19-13-6-10-5-11-9(2-1-3-15(11)25-8-17(23)24)4-12(10)18(13)14(20)7-16(21)22/h1-3,10,12-13,18-19H,4-8H2,(H,21,22)(H,23,24)/p-1/t10-,12-,13+,18+/m0/s1