A few years ago James La Clair published a synthesis of hexacyclinol, and it was immediately met with skepticism. Rychnovsky studied the NMR data for the natty-P and others and via comparison proposed a new structure, that was eventually made by Porco and proved to be both the compound in question, and have the Rychnovsky proposed structure.
La Clair commented in Nature: "La Clair now says that he and Porco may have made two different molecules that happen to have very similar NMR spectra."
As far as I know La Clair has not done any more in this area, to defend himself or otherwise, which is odd considering he claimed to have more than a gram of the material in question on hand.
Today in Org. Lett. a paper came out specifically examining this problem of the different compound-same NMR spectra issue.
Where 2 is the Rychnovsky proposed correct structure, and 1 is the original La Clair claimed structure.
This seems to me to be a lot like backhanding La Clair right in the face while calling him a bitch.
That and flogging a dead horse.