You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
methyl (5R)-3-amino-5-(4-bromophenyl)-2-cyano-7-methyl-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C16H13BrN4O2S
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