NC(=O)NCc4ccc(O)c(c3cc([C@@H](CC([O-])=O)C([O-])=O)cc(c2nc1cc(C(N)=[NH2+])ccc1[nH]2)c3O)c4 C1B_258_2B7D -0.71 256.13 39 531.505 13 10 3 9 445.626