I use babel to remove salts from smiles and I have encountered that babel
changes heterocyclic compounds with nitrogens, see example below.
Does anyone have any suggestions why this might happen?

input:
C[C@H](CN1CCC(CC1)N2C(=O)Nc3cc(Cl)ccc23)NC(=O)c4cc5ccccc5[nH]4.OC(=O)C(F)(F)F

command: obabel -ismi file_in.smi -r -osmi -O file_out.smi

output: C[C@H](CN1CCC(CC1)n1c(=O)[nH]c2cc(Cl)ccc12)NC(=O)c1cc2ccccc2[nH]1

thanks!

Elisabet



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