You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 2-[[(9R)-9-ethyl-9,15-dimethyl-11-oxo-12,14,15,17-tetrazatetracyclo[8.7.0.02,7.012,16]heptadeca-1(10),2,4,6,13,16-hexaen-13-yl]sulfanyl]-N-(3-methoxyphenyl)acetamide into its molecular formula.
user
C26H27N5O3S
assistant