InChI=1S/C22H23NO4/c1-3-4-10-16-11-17-19(23-13-18(21(17)24)22(25)26-2)12-20(16)27-14-15-8-6-5-7-9-15/h5-9,11-13H,3-4,10,14H2,1-2H3,(H,23,24)