You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule N-(1,3-benzothiazol-2-ylmethyl)-2-[[5-[[(3R)-1,1-dioxothiolan-3-yl]methyl]-1,3,4-oxadiazol-2-yl]sulfanyl]-N-methylacetamide .
user
C18H20N4O4S3
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