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 ethyl (2R)-2-(1,2,3,5,6,7-hexahydro-s-indacen-4-ylcarbamoyloxy)-3-(1,2,4-triazol-1-yl)propanoate .
user
C20H24N4O4
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