You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl N-[(2R,3R)-5-amino-6-methyl-3-(phenylmethoxymethyl)hept-6-en-2-yl]-N-benzylcarbamate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C28H40N2O3
assistant