You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(5R,6R,7R)-2-N-butyl-7-ethyl-3-[(2S)-1-hydroxybutan-2-yl]-4-oxo-6-N-phenyl-2-N,6-N-bis(prop-2-enyl)-10-oxa-3-azatricyclo[5.2.1.01,5]decane-2,6-dicarboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C32H45N3O5
assistant