You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule methyl (5R)-7-ethyl-3-[2-oxo-2-(2-pyridin-2-ylethylamino)ethyl]-5-(3-phenoxyphenyl)-5H-[1,3]thiazolo[3,2-a]pyrimidine-6-carboxylate .
user
C31H30N4O4S
assistant