2-(aminomethyl)-3-hydroxy-5-oxo-4-(seryl-2-carboxy-beta-aspartyl)-2,5-dihydro-1H-pyrrole InChI=1/C13H18N4O9/c14-2-5-8(20)7(10(22)16-5)6(19)1-13(11(23)24,12(25)26)17-9(21)4(15)3-18/h4-5,18,20H,1-3,14-15H2,(H,16,22)(H,17,21)(H,23,24)(H,25,26 isovaline, seryl-4-[5-(aminomethyl)-2,5-dihydro-4-hydroxy-2-oxo-1H-pyrrol-3-yl]-2'-hydroxy-2',4-dioxo-