Hi Sergei,

This isn't a layout or coordinate generation problem though,  just a
question of depictio, so there's no need for any changes to
mcdlutil.cpp.

We just need to render the double bond as a twisted double bond. See
Option 3 at 
http://metamolecular.com/blog/2011/06/14/why-chemwriter-doesnt-follow-iupacs-recommendations-for-depicting-unknown-double-bond-stereochemistry/.

Perhaps others have some comments on this?

- Noel

On 1 April 2012 14:35, Sergey V. Trepalin <t...@chemical-block.com> wrote:
> Hello, Noel
> Just read the request. Which field of a OBBond I can use to read/set twisted
> double bond? Have you refernces for the examples of drawing such bonds? And
> standard question-please give me reference to the last release of
> MCLUTIL.cpp
> With best wishes, Sergei

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