InChI=1S/C18H19NO6/c1-24-15-8-11(4-7-13(15)21)16-17(25-16)18(23)19-9-14(22)10-2-5-12(20)6-3-10/h2-8,14,16-17,20-22H,9H2,1H3,(H,19,23)