You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-2-(2-aminoethyl)-N-[(8S,11R,14S)-3,18-bis(2-aminoethoxy)-8-(3-cyanopropanoyl)-11-methyl-10,13-dioxo-9-azatricyclo[13.3.1.12,6]icosa-1(18),2,4,6(20),15(19),16-hexaen-14-yl]-4-[4-(4-tert-butylphenyl)-2,6-dimethylphenyl]-N-methyl-4-oxobutanamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C53H66N6O7
assistant