OC(CCNC(CCN1CCC1C(O)=O)C(O)=O)C(O)=O
InChI=1S/C12H20N2O7/c15-9(12(20)21)1-4-13-7(10(16)17)2-5-14-6-3-8(14)11(18)19/h7-9,13,15H,1-6H2,(H,16,17)(H,18,19)(H,20,21)