---
name: "obchiral"
section: "1"
platform: "linux"
package: "openbabel"
version: "3.2.1-1"
release: "Arch Linux 2026-11-01"
platforms: ["linux"]
url: "https://new.carta.tech/obchiral"
---

# obchiral(1)

print molecular chirality information

## NAME

**obchiral** – print molecular chirality information

## SYNOPSIS

**obchiral** *filename*

## DESCRIPTION

The **obchiral** program is a tool to print the chirality information for all molecules in a file. It also serves as example code for using the Open Babel library (libopenbabel).

## EXAMPLES

```
obchiral pyridines.sdf
```

## SEE ALSO

[obabel(1)](/obabel/1.md), [obfit(1)](/obfit/1.md), [obgrep(1)](/obgrep/1.md), [obprop(1)](/obprop/1.md), [obrotate(1)](/obrotate/1.md).\
 The web pages for Open Babel can be found at: \<**https://openbabel.org/**\>

## AUTHORS

The obchiral program was written by Nick England

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**\>

## COPYRIGHT

Copyright (C) 2005 Nick England.\
 Some portions Copyright (C) 1998-2001 by OpenEye Scientific Software, Inc.\
 Some portions Copyright (C) 2001-2007 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.