On 06/06/2012 13:39, Martin Guetlein wrote:
> Hi All,
>
> this is how I use openbabel to compute descriptors, L5 is not working,
> though (openbabel version is 2.3.1).
>
> $obabel -:CCC -otxt --append MW -osmi
> CCC     44.0956
> 1 molecule converted
> $obabel -:CCC -otxt --append L5 -osmi
> CCC     nan
> 1 molecule converted

The descriptor L5 returns a boolean
  HBD<5 && HBA1<10 && MW<500 && logP<5

and so should be used like:

obabel 40mols.smi -osmi --filter L5
Nc1nc2[nH]nnc2c(=O)[nH]1        1
...
Nc1ccc(cc1)S(=O)(=O)c1ccc(N)cc1 38
CCc1nc(N)nc(N)c1c1ccc(Cl)cc1    40
34 molecules converted

I'll add a usage note to the description of L5. But using it in the way 
you are attempting is clearly a good idea. I'll look into it. Thanks.

Chris

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