You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-methyl-3-(methylamino)-N-(5,6,7,8-tetrahydro-4H-cyclohepta[d][1,3]thiazol-2-yl)propanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C13H21N3OS
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