[N-]=NC=c1[nH]c2c(c1C[C@H](N)C(=O)O)C(=[F+])C=CC=2 93 Strange valence at F C=C1C=C([N+](=O)[O-])C(C#CCN=C(O)Cc2ccc(Cl)cc2Cl)=C[NH+]1[O-] 285 Strange valence at N [N-]=NC=c1[nH]c2c(c1C[C@H](N)C(=O)O)C=C(F)C(=[Cl+])C=2 350 Strange valence at Cl C=C1C=C([N+](=O)[O-])C(C#Cc2cc(Cl)ccc2OC)=C[NH+]1[O-] 152 Strange valence at N