You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [(2R,3E,5R,7S,9E,11S,14S,15R,16S)-16-benzyl-5-hydroxy-5,7,13,14-tetramethyl-18-oxo-17-azatricyclo[9.7.0.01,15]octadeca-3,9,12-trien-2-yl] acetate into its molecular formula.
user
C30H39NO4
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