InChI=1S/C21H24N2O3/c1-3-11-10-23-15-8-13(11)21(19(25)26-2)16(23)9-20(18(21)24)12-6-4-5-7-14(12)22-17(15)20/h3-7,13,15-18,22,24H,8-10H2,1-2H3/b11-3-/t13?,15-,16-,17?,18-,20?,21?/m0/s1