How to neutralize molecules (removing charges)

Hi everyone,

I am working with a set of charged organic compounds and, of course, fingerprints are different compared to same fingerprints of same neutral compounds.

I could not see so far any chemoinformatic node in KNIME providing this function (neutralization).

Any tip for me?

Should I consider “string manipulation” of “charged smiles” to do that? :stuckouttongueclosedeyes:

What about Nitrogens?

Many thanks

Andrea