You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (2R)-N-butyl-2-[3-(4-tert-butylphenyl)propanoyl-[(3-methylphenyl)methyl]amino]butanamide by IUPAC nomenclature, provide its molecular formula.
user
C29H42N2O2
assistant