@handyandy saidLooking through hefty dictionaries?
It's medication for anxiety.
It was quite a calming activity.
@forkedknight saidThere's quite a few mentions of oxyxylene now (growing too).
Bingo? I did a google search, and found a couple of obscure chemistry papers that use "oxyxylene", and your post. I don't think oxyzylene is a thing
Seems to recently have become a "thing".