InChI=1S/C22H25NO6/c1-4-5-6-10-13-16-14(2)17(24)21(29-16)19(26)22(28-3,23-20(21)27)18(25)15-11-8-7-9-12-15/h5-9,11-12,19,26H,4,10,13H2,1-3H3,(H,23,27)/b6-5+/t19-,21-,22+/m1/s1