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 benzyl N-[(8R,13R)-8-[2-[2-(2-hydroxyethoxy)ethylamino]-2-oxoethyl]-7,14-dioxo-15-oxa-6-azaspiro[4.11]hexadec-10-en-13-yl]carbamate .
user
C28H39N3O8
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