InChI=1/C15H12O5/c16-12-5-3-9(7-11(12)15(19)20)1-2-10-4-6-13(17)14(18)8-10/h1-8,16-18H,(H,19,20)/p-1/b2-1+/fC15H11O5/q-1 A0492CDECDF9BF29