You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
ethyl (3S)-1-(8-methyl-6-phenyl-4,5-dihydrothieno[2,3-e]indazole-2-carbonyl)piperidine-3-carboxylate is the IUPAC name of a molecule. Please give its molecular formula.
user
C25H27N3O3S
assistant