You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R,3aS,6aS)-N-(oxan-4-ylmethyl)-4-(pyridin-3-ylmethyl)-2,3,3a,5,6,6a-hexahydrofuro[3,2-b]pyrrole-2-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C19H27N3O3
assistant