InChI=1S/C18H18O7/c19-13-3-1-2-12(8-13)10-16(18(23)24)25-15-6-4-11(9-14(15)20)5-7-17(21)22/h1-4,6,8-9,16,19-20H,5,7,10H2,(H,21,22)(H,23,24)