InChI=1S/C18H22O6/c1-2-24-17(23)11-13-10-14(20)12-16(22)18(13)15(21)8-6-4-3-5-7-9-19/h3-4,6,8,10,12,19-20,22H,2,5,7,9,11H2,1H3