InChI=1S/C21H33NO4/c1-2-3-4-5-6-7-8-9-10-11-20(24)22-19(21(25)26)16-17-12-14-18(23)15-13-17/h12-15,19,23H,2-11,16H2,1H3,(H,22,24)(H,25,26)/t19-/m0/s1