You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[2-(cyclopropylmethyl)pyrazol-3-yl]-3-[(2S)-2-methoxy-2-thiophen-2-ylethyl]urea The above is the IUPAC name of a molecule. Write its molecular formula.
user
C15H20N4O2S
assistant