InChI=1/C17H26N2O4/c1-5-17(4,21)10-18-16(20)19-13-9-14-12(7-11(3)23-14)8-15(13)22-6-2/h8-9,11,21H,5-7,10H2,1-4H3,(H2,18,19,20)/t11-,17-/m1/s1/f/h18-19H 3FE7D85D3AD019B9