A number of conversations have been going on lately regarding our use of InChI Strings and Keys. Specifically, since we have hundreds of thousands indexed now, and continue to be indexed at about 40,000 per day the ChemSpider InChI identifiers may become the most general proliferating InChIs on the web. There are many settings for InChI. The screenshot below is from the wInChI executable distributed as a part of the standard InChI distribution pack.

We have decided to use the following settings for our generation of InChIs across ChemSpider.

Mobile H Perception ON

Absolute Stereo ON

Isotopic ON

Omit undefined/unknown stereogenic centers and bonds

For those of you interested in InChI, and wondering what we are using as our settings there you go. If we all adopt the same settings then we will be able to connect via our mutual identifiers and help that “semantic web” we are talking about…

 

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