You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(7S)-N-(2,4-dimethylphenyl)-5-methyl-7-[(E)-2-phenylethenyl]-4,7-dihydro-[1,2,4]triazolo[1,5-a]pyrimidine-6-carboxamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C23H23N5O
assistant