You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (2R,3S,4R,5S,6S)-2-(hydroxymethyl)-6-[[(4-methoxyphenyl)methyl-(3-methylbutyl)amino]methyl]oxane-3,4,5-triol ?
user
C20H33NO6
assistant