On Dec 13, 2007, at 3:50 AM, Gianfranco wrote:

> Rajarshi Guha wrote:
>
> I wrote this, because in pubchem maccs the bit number 344 (encoding  
> the presence of substructure C(~C)(~H)) is high for the Ethane  
> molecule.
> This means that this bit encodes for any carbon-carbon pair where  
> the first carbon is bonded to at least one hydrogen.
>
> But if we use the Daylight tool, with these SMILES
> O=CC=O
> CCC
> C(C)(C)CC
> only the third is positive (you are on right)...
> but the first SMILES doesn't....

[CH1,CH2,CH3]~C matches all 3 correctly

PS: Please keep discussions on list as it may be helpful to others  
later on

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Rajarshi Guha  <[EMAIL PROTECTED]>
GPG Fingerprint: 0CCA 8EE2 2EEB 25E2 AB04  06F7 1BB9 E634 9B87 56EE
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