InChI=1S/C19H25NO4/c1-12(2)9-10-24-15-7-5-14(6-8-15)17-16(11-13(3)4)18(21)20(23)19(17)22/h5-9,13,19,22-23H,10-11H2,1-4H3/t19-/m1/s1