InChI=1/C21H35NO4/c1-21(2,3)18(23)19(24)22-14-8-7-13-17(22)20(25)26-15-9-12-16-10-5-4-6-11-16/h16-17H,4-15H2,1-3H3/t17-/m1/s1 D98E879AA6111332