InChI=1S/C18H22O6/c1-8(19)14-9-6-11-15-17(2,16(22)23-11)5-4-12(20)18(15,3)10(9)7-13(21)24-14/h7-8,11-12,15,19-20H,4-6H2,1-3H3/t8?,11-,12?,15+,17+,18+/m1/s1