You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [1-[hydroxy(3-oxobutanethioyloxy)phosphoryl]-2-(1,2,4,5-tetraethylpyridin-1-ium-3-yl)ethyl]phosphonic acid into its molecular formula.
user
C19H32NO7P2S+
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