You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-ethyl-3-[4-[(R)-hydroxy-[(3R)-4-[(4-methoxyphenyl)methyl]-5-oxomorpholin-3-yl]methyl]phenyl]urea ?
user
C22H27N3O5
assistant