You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the compound with this IUPAC name N-(3-cyanothiophen-2-yl)-3-[[(3R)-2,3-dihydro-1,4-benzodioxin-3-yl]methyl-methylamino]propanamide ?
user
C18H19N3O3S
assistant