for the following products
2-(1-Oxy-pyridin-2-yl)-1,1,3,3-tetramethylisothiouronium tetrafluoroborate | S-(1-Oxido-2-pyridyl)-N,N,N',N'-tetramethylthiuronium tetrafluoroborate | TOTT and S-(1-Oxo-2-pyridyl)-thio-N,N,N,'N'-tetramethyluronium tetrafluoroborate