You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 1-(4-ethylphenyl)-N-(4-methylphenyl)-8-oxo-3-(2-phenylethyl)-2,4,6,7-tetrahydropyrimido[1,2-a][1,3,5]triazine-6-carboxamide .
user
C30H33N5O2
assistant