You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (13R)-13-methyl-4-pyrrolidin-1-yl-8,14-dioxa-5,10,19,20,23-pentazatetracyclo[13.5.2.12,6.018,21]tricosane into its molecular formula.
user
C21H40N6O2
assistant