You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule 11,13-dimethyl-4-[(3S)-1-methylsulfonylpiperidin-3-yl]-16-thia-3,5,6,8,14-pentazatetracyclo[7.7.0.02,6.010,15]hexadeca-1(9),2,4,7,10(15),11,13-heptaene .
user
C18H20N6O2S2
assistant