InChI=1/C15H18N2O3/c1-10-7-16(8-11(2)20-10)9-17-13-6-4-3-5-12(13)14(18)15(17)19/h3-6,10-11H,7-9H2,1-2H3/t10-,11+ 4A64C8B6757EB6CC