You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-[[(2S)-2-(4-chloro-2,6-dimethylphenoxy)propanoyl]amino]-3-(2-morpholin-4-ylethyl)thiourea is the IUPAC name of a molecule. Please give its molecular formula.
user
C18H27ClN4O3S
assistant