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 (4R)-N-[(3R)-4-(cyclohexylmethylamino)-3-hydroxy-4-oxobutyl]-2,2,5,5-tetramethyl-1,3-dioxane-4-carboxamide .
user
C20H36N2O5
assistant