InChI=1S/C17H16O5/c1-9-5-12(18)3-4-15(9)22-13-7-11-6-10(2)21-17(20)16(11)14(19)8-13/h3-5,7-8,10,18-19H,6H2,1-2H3/t10-/m1/s1