InChI=1S/C21H26N2O4.C4H6O5/c22-19(26)15-4-3-13-9-16-21(27)6-5-14(24)10-20(21,17(13)18(15)25)7-8-23(16)11-12-1-2-12;5-2(4(8)9)1-3(6)7/h3-4,12,16,25,27H,1-2,5-11H2,(H2,22,26);2,5H,1H2,(H,6,7)(H,8,9)/t16-,20-,21-;2-/m10/s1