Hello Wenhan Chen

I see that the slow part is optimizing the 3D geometry from JME 
format, maybe from smiles too.
See my updated page
http://biomodel.uah.es/en/DIY/JSME/

Using the "diagnostics" you will see the difference.
I think MOL format is the fastest. I have managed to solve the 
problem I had with tertiary carbons.

About your specific problme with charged atoms, you will have to test 
which format is best understood.


> load SMILES "xxxxxxx" is what I am using. However what I found it, 
> the smiles string is not sufficient to depict the original 2D 
> structure.

Well, smiles is 1D, so there may be limitations. It works with normal 
structures,. but yours seem to be special.

> Some of the molecules we tried to build lost the double bonds when 
we 
> get the result from the cactus.

MOL will be better at keeping the double bonds.


> conversion of the sdf
> file to other formats could be so troublesome. I thought it is 
> straightforward in babel. 

That's what Babel is made for -- format conversions. You should not 
really need to convert formats, just use one that is best written by 
JSME and read by JSmol


However now I am stuck at the adding 
> correct number of H atoms
> to the charged atoms in sdf file which is kind of disturbing. 
Anyway, 
> I still am looking for ways to correct the number of H atoms.

I've drawn this

           C+
          /   \
        C -- -C

and transferred as mol: I get cyclo CH2-CH2-CH
and the +1 charge is there:

label %[charge];
color label yellow;
font label 22;

Transfer as JME works too, and smiles too 

Not for you?


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