On Wed, Oct 13, 2010 at 8:58 PM, Geoffrey Hutchison
<ge...@geoffhutchison.net> wrote:
>> 3429680: [Li+251] 24639246
>> 3429701: [ClH+276] 24639289
>> 3429702: CCCC[n+251]1cccc(C)c1 24639291
>
> These are an easy fix to the SMILES reader. Currently, we only take single 
> digits for charge. Now I think the molecule is preposterous (e.g., lithium 
> doesn't have 251 electrons to remove!) but I can certainly imagine some 
> metals with formal charges of +10 or above.
>
> My feeling is that eMolecules probably wants to add some level of filtering 
> to remove species with highly unusual valence.

Yes, but we should handle this by throwing an error. There are
probably more of these cases though.

> Also, does the SMILES format have a "continue after error" flag like SDF? 
> That seems like a good addition.

I don't think so but this would be nice since it is a widely used format.

It would also be nice to have an option to write all molecules that
produced an error to a file for example. (Gert suggested this) This
could be done from OBConversion I think.

>> These have large rings which are not found I think. We should be able
>> to correctly detect ring membership though since this is done using a
>> spanning tree before SSSR/LSSR analysis is done. I'll take a look at
>> this.
>
> I found this similar bug when doing fragment analysis last night. I have a 
> defensive fix which solves the segfault but does not fix the analysis. I'll 
> commit that shortly which is useful anyway.

Sounds good.

>> consider the H atoms that are added when writing out the smiles. I can
>> add this to the canonical code but I'll probably copy some code for
>> this from the smiles format.
>
> That makes a lot of sense. It definitely seems like trunk is getting much 
> closer to "bullet-proof" which is a good sign before a release. Next come 
> thousands of users who will test our definition of bullet-proof. :-)

All 5 million structures now pass the shuffle test without stopping or
segfaults.

Tim

> Thanks,
> -Geoff

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