You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance (1R,3R,4S)-4-hydroxy-3-methoxy-N-[[1-(4-methoxyphenyl)cyclopentyl]methyl]cyclohexane-1-carboxamide .
user
C21H31NO4
assistant