InChI=1S/C19H27NO4/c1-20-9-8-18-11-13(21)6-7-19(18,22)15(20)10-12-4-5-14(23-2)17(24-3)16(12)18/h4-5,13,15,21-22H,6-11H2,1-3H3/t13-,15-,18-,19-/m1/s1