You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(1R,10S,11S,15R)-10-(3-chloro-4-hydroxy-5-methoxyphenyl)-13-(3-chlorophenyl)-4-[2-(6,7-dimethoxy-4-methyl-3-oxoquinoxalin-2-yl)ethyl]-11-phenyl-2,4,6,13-tetrazatetracyclo[7.7.0.02,6.011,15]hexadec-8-ene-3,5,12,14-tetrone is the IUPAC name of a molecule. Please give its molecular formula.
user
C44H38Cl2N6O9
assistant