I think you mean oxycodone not oxycodeine, but whatever, we all make mistakes. Oxycodone is the active chemical in Oxycontin. Oxycontin is a brandname for time-release Oxycodone pills.
Whatever, oxycontins are time release oxycodone pills.
You may remember oxycodone from such pharmies as percocet. The difference there is that percocet isn't time release and comes with a bunch of tylenol in the pill.