You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[(R)-(1-benzyltetrazol-5-yl)-[4-(2-methoxyphenyl)piperazin-1-yl]methyl]-8-methyl-1H-quinolin-2-one is the IUPAC name of a molecule. Please give its molecular formula.
user
C30H31N7O2
assistant