You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1S,2R,4R,5S,7S,11S,12S,15R,16S)-15-[(2S,3S,4S,5S)-5-ethyl-3,4-dihydroxy-6-methylheptan-2-yl]-4,5-dihydroxy-2,16-dimethyl-8-azatetracyclo[9.7.0.02,7.012,16]octadecan-9-one The above is the IUPAC name of a molecule. Write its molecular formula.
user
C29H51NO5
assistant