You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule [5-(5-amino-2,7-dioxo-6H-[1,3]thiazolo[4,5-d]pyrimidin-3-yl)-4-(2-methoxy-2-oxoethyl)-1,3-oxathiolan-2-yl]methyl benzoate .
user
C19H18N4O7S2
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