You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Convert the IUPAC name of a molecule [7-(4-methoxyphenyl)-5-phenyl-6,7-dihydro-5H-[1,2,4]triazolo[1,5-a]pyrimidin-4-yl]-(3-nitrophenyl)methanone into molecular formula.
user
C25H21N5O4
assistant