You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 6,8-difluoro-1-methyl-7-(3-methyl-4-propan-2-ylpiperazin-1-yl)-4-oxoquinoline-3-carboxylic acid .
user
C19H23F2N3O3
assistant