InChI=1S/C16H18O10/c17-10-11(18)14(15(20)21)26-16(12(10)19)22-4-9-13(25-9)6-1-2-7-8(3-6)24-5-23-7/h1-3,9-14,16-19H,4-5H2,(H,20,21)