InChI=1S/C18H19NO6/c1-25-17-9-11(2-7-14(17)21)8-15(22)18(24)19-10-16(23)12-3-5-13(20)6-4-12/h2-9,16,20-23H,10H2,1H3,(H,19,24)/b15-8-