olccs16 annotated e:Ch03315 in the group OLCCSendmail at 2017-01-27T18:26:18

in reference to:

Whereas the sodium salt of the acid1, Scheme 1, is listedin Beilstein with molecular formula C6H4NO3S.Na and inRegistry as C6H5NO3S.Na, both databases give the samemolecular formula (C5H5N.C2HF3O2) for pyridinium tri-fluoroacetate,

olccs16 said:

i think the dot would represent the fragment if you continue reading at the next paragraph and checking the structure for pyridinium trifluoroacetate.