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