InChI=1/C21H28N2O3/c1-11-8-9-18(26-7)17(10-11)13(3)22-15(5)21(25)20-12(2)19(16(6)24)14(4)23-20/h8-10,13,15,22-23H,1-7H3/t13-,15+/m0/s1 1D8087A00B77A43B