You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
14-[3-[[4-(4-butylphenyl)benzoyl]amino]propanoyl-methylamino]-18-hydroxy-10,13-dioxo-9,12-diazatricyclo[13.3.1.12,6]icosa-1(18),2,4,6(20),15(19),16-hexaene-8-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C40H42N4O7
assistant