You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(3-phenyl-6,7-dihydro-4H-triazolo[5,1-c][1,4]oxazin-6-yl)methyl]thiophene-3-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H16N4O2S
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