You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(1R,3R,4aR,9aS)-1-(hydroxymethyl)-3-[2-oxo-2-(pyridin-2-ylmethylamino)ethyl]-3,4,4a,9a-tetrahydro-1H-pyrano[3,4-b][1]benzofuran-6-yl]-1,3-benzodioxole-5-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H27N3O7
assistant