InChI=1/C14H20N2O2/c1-9-4-10(2)8-16(7-9)14(18)13-5-12(6-15-13)11(3)17/h5-6,9-10,15H,4,7-8H2,1-3H3/t9-,10+ 4E9D39F4B7DDFC22