InChI=1/C18H16O3/c1-2-13(12-8-4-3-5-9-12)16-17(19)14-10-6-7-11-15(14)21-18(16)20/h3-11,13,20H,2H2,1H3/t13-/m0/s1 04F61A8B5D6AD1D3