You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
N-benzyl-6-[(4-hydroxyphenyl)methyl]-8-[[6-(4-methylsulfanylphenyl)pyridin-2-yl]methyl]-4,7-dioxo-2-prop-2-enyl-3,6,9,9a-tetrahydropyrazino[2,1-c][1,2,4]triazine-1-carboxamide is the IUPAC name of a molecule. Please give its molecular formula.
user
C37H38N6O4S
assistant