You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
benzyl N-butyl-N-[7-(4-propylpiperazin-1-yl)-1,2,3,4-tetrahydronaphthalen-1-yl]carbamate;benzyl N-methyl-N-[7-(4-propylpiperazin-1-yl)-1,2,3,4-tetrahydronaphthalen-1-yl]carbamate is the IUPAC name of a molecule. Please give its molecular formula.
user
C55H76N6O4
assistant