CIP rules for stereochemistry

Uniquely identifying stereochemical enantiomers is an important aspect of data exchange of chemical structures. The simplest, most neglected solution is to pass around 3D models, but a lot of people like to stick to things like SMILES, or IUPAC names. Now, given that we want to uniquely represent the stereochemistry, we can use special rules. One example for enantiomers are the Cahn-Ingold-Prelog (CIP) rules.

3 minute read

ACS Liveblogging 1st Disclosures of Drug Candidates

Carmen liveblogged via her twitter account the disclosures of drug candidates at the past ACS meeting, and later aggregated the tweets in her blog. While many of her tweets made it into the FriendFeed room, the structure she drew up and shared did not make it. And until just know, I was not aware the had tweeted those too. The first twitpic she pushed was:

less than 1 minute read

CDK-JChemPaint #5: the Groovy-JChemPaint repository

Oh, I forget to mention just earlier that I have set up a small git repository with the full Groovy demo scripts. Additionally, requests on further tutorials and/or bug reports can be filed in the matching Issues tracker.

less than 1 minute read

CDK-JChemPaint #4: embedding the renderer into a Swing panel

Now that we covered the utmost basics of using the CDK-JChemPaint patch (see #1, #2, #3), it is time to move on. I am happy to hear that so many people have started using the new rendering architecture, either via the EBI JChemPaint Swing applet/application branch, or via the CDK-JChemPaint patch.

2 minute read

BitTorrents for Science

The idea has been lingering in the air for a long time now: sharing large science data sets using bittorrent. Over the past couple of years I have seen a lot of science related software being distributed over torrents, and the use in open source in general is abundant. Given a good network of so-called seeders, download times go down dramatically, and the overall energy consumption goes down too, as data has to follow a much shorter path.

3 minute read

CDK-JChemPaint #3: rendering parameters

OK, one last CDK-JChemPaint tutorial for today (see #1 and #2). Rendering wasn’t as much fun, if you could not tune it to your needs. JChemPaint has long had many rendering parameters, and one by one we are converting them to the new API. The following code is an modification to the first example, and adds some code to list all rendering parameters for the three used generators:

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CDK-JChemPaint #2: rendering reactions

I posted earlier today a Groovy script to render molecules with CDK-JChemPaint 8. Now, the new JChemPaint rendering engine also contains the functionality to render reactions. So, I can also do:

1 minute read