Other than the ones from VRUS, there are unnamed preclinical pyrimidine nuke(s) from IDIX, according to the company. I’ve been unable to determine whether GS6620 from GILD and TMC649128 from Medivir/JNJ are pyrimidines or purines.
“The efficient-market hypothesis may be the foremost piece of B.S. ever promulgated in any area of human knowledge!”