When I first read this a few days ago the scientists explicitly stated that they hadn't published their results yet. Have they changed their story? From the BBC article on it:

"He told the BBC of his shock when he found what it had done, given his research was not published so could not have been found by the AI system in the public domain."

Also:

Prof Penadés' said the tool had in fact done more than successfully replicating his research. "It's not just that the top hypothesis they provide was the right one," he said. "It's that they provide another four, and all of them made sense. "And for one of them, we never thought about it, and we're now working on that."