This is great news, if we are correctly acknowledged we are more than happy to give our permission for you. Here is a short guide about how citing ChemAxon; but if you refer to the company, to the tool the picture was generated in - and maybe the version, that is absolutely enough. If you can insert a URL that is definitely a plus, but it also depends on the format of the book or page as well.
Thanks a lot for citing us,
Thanks for your fast answer. Following your recommendation, a proper credit for the figure should be:
with permission of ChemAxon, from the JChem manual (JChem 220.127.116.11), 2016, Chemical Hashed Fingerprint, https://docs.chemaxon.com/display/docs/Chemical+Hashed+Fingerprint
Is it correct?
Thanks for your permission.
That will be amazingly great. Thanks :)