Hi Guillaume,

please use the cdk-jchempaint or cdk-user mailing list next time.

On Mon, Aug 31, 2009 at 3:24 PM, Guillaume Durieu<gdur...@...> wrote:
> I have trouble with a peculiar molecule that I cannot render well using
> CDK (tried all versions...)
> For instance, the smile C(=O)c1cnn2ccccc12 should be rendered with
> double bonds in both cycles. Instead, only single bonds are shown.

CDK readers read what you pass them. The above indicates (at least by
the OpenSMILES definition) aromatic bonds, but they do not include
bond order information for the bonds, so that is not read and not
displayed.

Surely it is possible to deduce those missing double bond orders (the
location of them, that is), which can be done with the
DeduceBondSystemTool... it is not perfect, but does a good fairly good
job.

Make sure you have turned on the JChemPaint option to show aromatic
rings, and you should be set.

Egon

-- 
Post-doc @ Uppsala University
http://chem-bla-ics.blogspot.com/

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