You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(2R)-N-(4-methylphenyl)-2-[[(1R,8R)-8,11,11-trimethyl-3,4,6-triazatricyclo[6.2.1.02,7]undeca-2(7),3,5-trien-5-yl]sulfanyl]propanamide The above is the IUPAC name of a molecule. Write its molecular formula.
user
C21H26N4OS
assistant