InChI=1S/C23H27NO4/c25-21-15-19(16-5-2-1-3-6-16)12-13-20(21)17-8-10-18(11-9-17)23(28)24-14-4-7-22(26)27/h1-3,5-6,8-11,19-21,25H,4,7,12-15H2,(H,24,28)(H,26,27)/t19-,20+,21-/m0/s1