You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[3-(9H-fluoren-9-ylmethoxycarbonylamino)-4-methyl-5-(piperazin-1-ylmethyl)phenyl]boronic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C27H30BN3O4
assistant