You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name [2-[(4-methoxyphenyl)methylamino]-2-oxoethyl]-[[(2R)-oxolan-2-yl]methyl]-(thiophen-2-ylmethyl)azanium into its molecular formula.
user
C20H27N2O3S+
assistant