You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule (5S,10bS)-9-chloro-5-ethyl-5-methyl-2-thiophen-2-yl-1,10b-dihydropyrazolo[1,5-c][1,3]benzoxazine ?
user
C17H17ClN2OS
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