Erroneous nitrates in SDF files

[IAlibay]

Background

Using the SDF files we have found that for some ligands the nitrate groups are represented in a way that can cause issues: OpenFreeEnergy/pontibus#55 (comment)

This yields bad free energy results.

The ask

Updating the SDF files so that nitrates are percieved as [N+](=[O])[O-].

[davidlmobley]

Noted; not sure how soon I'll get to this but another thing just came through I need to deal with so maybe I can handle this at the same time.

[IAlibay]

not sure how soon

If it helps, as far as I can tell this isn't a priority for us. We only raised it here so that we didn't lose track of it forever.