You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-cyclopropyl-3-[(2R)-2-(dimethylamino)-2-thiophen-3-ylethyl]-1-(furan-2-ylmethyl)urea is the IUPAC name of a molecule. Please give its molecular formula.
user
C17H23N3O2S
assistant