You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-[(2-hydroxy-5,6,7,8-tetrahydronaphthalen-1-yl)methyl]-2,3-dihydro-1,4-benzodioxine-3-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C20H21NO4
assistant