Template:Chemical structure verified/doc

Parameters
There are four parameters, all of them optional:
 * version: the version of the image which has been verified (copied from the "File history" box on the image page)
 * CAS: the CAS Registry Number of the compound
 * InChI: the International Chemical Identifier (InChI) for the compound
 * InChIkey: the InChI key

Example
gives