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 2-[(3,5-dimethyl-1,2-oxazol-4-yl)methyl]-1-ethyl-3-[[(2R)-1-methylsulfonylpyrrolidin-2-yl]methyl]guanidine .
user
C15H27N5O3S
assistant