You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(1S,3R,5R,6R,7S)-6-hydroxy-8-methyl-7-[(E)-2-methylbut-2-enoyl]oxy-8-azabicyclo[3.2.1]octan-3-yl] (E)-2-methylbut-2-enoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C18H27NO5
assistant