OBTAUTOMER(1)

💅 OBTAUTOMER(1) — the obtautomer page, bestie edition

okay so this is obtautomer, and it lives in the User's Reference Manual (fancy, right?). it's an Open Babel tool and honestly it does one thing and does it slay 🎀

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✨ NAME ✨

obtautomer — enumerates tautomer SMILES and canonical tautomer SMILES 💖

like, it takes your molecule and gives you all the tautomer SMILES, or if you're feeling lowkey minimal, just the canonical tautomer SMILES. no cap.

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🦋 SYNOPSIS 🦋

obtautomer [-c] filename

that's it. that's the whole vibe check. one optional flag, one filename, we move 🫶

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🌸 DESCRIPTION 🌸

Enumerates tautomer SMILES and canonical tautomer SMILES.

fr fr that's the entire description, bestie — it's giving "confident and concise." it enumerates the tautomer SMILES, and it enumerates the canonical tautomer SMILES. iconic behavior, no notes 👑

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🎀 OPTIONS 🎀

• -c — canonical tautomer only. just the one. main character energy, no entourage ✨

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🔥 EXAMPLES 🔥

the classic move:

obtautomer molecule.smi > tautomers.smi

Enumerates tautomers for molecule.smi and writes them to tautomers.smi 💀 so clean, so simple, redirect supremacy.

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🌈 SEE ALSO 🌈

• obabel(1) — the sibling, the legend, go say hi 💜

The web pages for Open Babel can be found at: <https://openbabel.org/> — bookmark it, it's a whole moment 🦋

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👑 AUTHORS 👑

Open Babel is developed by a cast of many, including current maintainers Geoff Hutchison, Chris Morley, Michael Banck, and innumerable others who have contributed fixes and additions. For more contributors to Open Babel, see <https://openbabel.org/docs/Introduction/thanks.html> — the group chat is huge and everyone ate 🫶

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⭐ COPYRIGHT ⭐

Copyright (C) 1998-2001 by OpenEye Scientific Software, Inc. Some portions Copyright (C) 2001-2008 by Geoffrey R. Hutchison and other contributors.

This program is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation version 2 of the License.

This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

💀 real talk: that all-caps WARRANTY bit is the serious part — it's distributed "in the hope that it will be useful" but with no warranty at all. read the GNU General Public License for the full details, bestie, it's not a joke 🙈

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and that's the page!! 💖✨🎀🦋🌸💅🫶

sign-off szn: this was Open Babel 3.2, dated May 26, 2026 — that's the version and the date, noted and loved, periodt 🌟