For people wondering about Ajax requests, Googlebot is performing them very well together with SVG rendering.

For example this URL:

https://www.chemeo.com/predict?smiles=CCCC

is performing the drawing of the molecule using RaphaelJS, then pulling the corresponding molecule from the database using Ajax and updating the page. Googlebot is performing all the steps perfectly well to add the end index the page.

It is very annoying because this is not important in our case, what we want is the good indexing of the main data pages, not these pages... I do not want to block the bot yet, but I need to figure out a way to have the main page better ranked.