You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (3R,6R,8S,11Z)-18-benzyl-1,3-dihydroxy-3,8,12,16-tetramethyl-7-oxa-18-azatricyclo[13.3.0.06,8]octadeca-11,15-dien-17-one into its molecular formula.
user
C27H37NO4
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