You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by (6S)-6-(3-acetamidophenyl)-8-methyl-N-phenyl-2,3,4,6-tetrahydropyrimido[2,1-b][1,3]thiazine-7-carboxamide ?
user
C23H24N4O2S
assistant