InChI=1S/C20H27N3O5/c24-18-15(8-4-12-22-13-5-9-17(20(27)28)23(18)22)21-16(19(25)26)11-10-14-6-2-1-3-7-14/h1-3,6-7,15-17,21H,4-5,8-13H2,(H,25,26)(H,27,28)/t15-,16-,17-/m0/s1