InChI=1/C20H18O4/c1-23-14-9-10-15-16(11-14)24-20(22)18(19(15)21)17(13-7-8-13)12-5-3-2-4-6-12/h2-6,9-11,13,17,21H,7-8H2,1H3/p-1/t17-/m0/s1/fC20H17O4/h21h/q-1 5C4097D59F19AFF6