InChI=1S/C19H28N2O6/c1-19(2,12-22)8-9-20-14(11-16(23)24)17(25)21-15(18(26)27)10-13-6-4-3-5-7-13/h3-7,14-15,20,22H,8-12H2,1-2H3,(H,21,25)(H,23,24)(H,26,27)