PubChemInstanceList and PubChemInstance ClassesThe PubChemInstanceList object is a superclass returned by a request for compound(s) from
the PubChem Database, such as the output from get_compounds, get_assays, etc.
The PubChemInstance object is another superclass for a PubChem instance, such as an assay, compound, substance, etc.
These instances are nested within the results slot of a PubChemInstanceList object. Similar to PubChemInstanceList,
the PubChemInstance also contains the same slots as described below. For more details, see instance.
results:A list containing elements of each of the requested compounds, assays, substances, etc.
request_args:A list containing the input arguments of a PubChem request.
success:A logical value indicating whether the request was successfully completed (TRUE) or not (FALSE).
error:A list detailing any errors encountered during the request, if applicable.