You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
tert-butyl 2-[6-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-3H-indol-2-yl]-2,3,3a,4,5,6,7,7a-octahydroindole-1-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H39BN2O4
assistant