You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[(Z)-[3-(4-morpholin-4-ylsulfonylphenyl)-1-phenylpyrazol-4-yl]methylideneamino]guanidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C21H23N7O3S
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