InChI=1S/C21H24N2O4/c1-3-12-10-23-16-8-14(12)19(11-24,18(25)26-2)20-9-17(23)27-21(16,20)22-15-7-5-4-6-13(15)20/h3-7,14,16-17,22,24H,8-11H2,1-2H3/b12-3-