139-33-3 2,2',2'',2'''-(ethane-1,2-diyldinitrilo)tetraacetic acid 4H-imidazol-4-one, 2-amino-1,5-dihydro-1-methyl- InChI=1/C10H16N2O8/c13-7(14)3-11(4-8(15)16)1-2-12(5-9(17)18)6-10(19)20/h1-6H2,(H,13,14)(H,15,16)(H,17,18)(H,19,20