InChI=1/C20H26N4O4/c1-3-21(4-2)20(28)23-13-11-22(12-14-23)19(27)15-5-7-16(8-6-15)24-17(25)9-10-18(24)26/h5-8H,3-4,9-14H2,1-2H3 F6DD1E89BAE68ED7