You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
For the molecule named (3S,3'R)-1'-[(2S)-2-amino-2-phenylacetyl]-N-tert-butyl-1-oxospiro[2,4-dihydroisoquinoline-3,4'-pyrrolidine]-3'-carboxamide by IUPAC nomenclature, provide its molecular formula.
user
C25H30N4O3
assistant