InChI=1S/C23H25NO4/c1-22-10-9-20(25)23(2,21(26)27)19(22)8-7-13-11-17-15(12-18(13)28-22)14-5-3-4-6-16(14)24-17/h3-6,11-12,19-20,24-25H,7-10H2,1-2H3,(H,26,27)/t19-,20+,22+,23+/m1/s1