> I have come across some ChemDraw files (.cdx and .chm files) that I need to
> convert to images. I found the Open Babel project, and was able to opne the
> .cdx files just fine, but this program does not seem to support the older
> .chm files.
.chm files are really, really old. For many reasons, I'd suggest you use
ChemDraw to convert all these files to CDX, CDXML, or SDF or similar modern
format.
IIRC, this was ChemDraw like v3.0 or something?
http://www.cambridgesoft.com/support/DesktopSupport/KnowledgeBase/FAQ/details/Default.aspx?TechNote=166
There are ways to automate ChemDraw for conversion (e.g., on Mac):
http://metamolecular.com/blog/2011/07/18/chembot-convert-chemdraw-cdx-files-into-png-images-using-applescript/
In any case, I've never seen any documentation on the .chm format, and I know
that the ChemDraw developers would rather see the newer format used.
Hope that helps,
-Geoff
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