InChI=1S/C14H16O5/c15-13(16)8-6-4-2-1-3-5-7-11-12(19-11)9-10-14(17)18/h1-8,11-12H,9-10H2,(H,15,16)(H,17,18)/b3-1-,4-2+,7-5+,8-6-