Hi Nadia
When you import a list, it usually brings up a wizard in which you match the name of the field in your list to the standard Marketo list. Once you have gone past this step, (where it tells you which fields are system blocked), it usually imports all the names in the list.
I have not come across the format you are looking for unfortunately. But, the field mapping above does the error messages in the data value blocked example.
Regards,
Prashant