You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[2-[(5-methyl-1,3,4-thiadiazol-2-yl)sulfanyl]ethyl]-2-(2-oxo-1,3-benzoxazol-3-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C15H16N4O3S2
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