You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-(5-methylspiro[4,5-dihydroindeno[1,2-e][1]benzothiole-6,9'-xanthene]-10-yl)-2-phenyl-6-pyridin-2-ylpyrimidine is the IUPAC name of a molecule. Please give its molecular formula.
user
C43H29N3OS
assistant