You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule 1-[3-(3-chloro-4-fluoroanilino)-8-thia-4,6,11-triazatricyclo[7.4.0.02,7]trideca-1(9),2,4,6-tetraen-11-yl]-4-(4-pyrimidin-2-ylpiperazin-1-yl)but-2-en-1-one into molecular formula.
user
C27H26ClFN8OS
assistant