InChI=1S/C17H16O6/c1-20-12-6-13(21-2)15(19)17-14(12)10-7-22-11-5-8(18)3-4-9(11)16(10)23-17/h3-6,10,16,18-19H,7H2,1-2H3/t10-,16-/m0/s1