InChI=1S/C14H16O5/c15-13(16)9-4-2-1-3-7-11-12(19-11)8-5-6-10-14(17)18/h1-5,7-9,11-12H,6,10H2,(H,15,16)(H,17,18)/b2-1+,7-3+,8-5+,9-4-