You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
What is the molecular formula of the molecule identified by tert-butyl N-methyl-N-[[1-(7-thia-9,11-diazatricyclo[6.4.0.02,6]dodeca-1(12),2(6),8,10-tetraen-12-yl)piperidin-4-yl]methyl]carbamate ?
user
C21H30N4O2S
assistant