C[C@H](NC(C)=O)C(=O)N[C@H](CCC(=O)N[C@@H](CCCC[NH3+])C(=O)N[C@H](C=O)[C@H]1SCC(=C)C(C([O-])=O)=N1)C([O-])=O MXG_400_1O07 -4.59 253.725 40 583.644 15 7 3 17 510.918