You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
1-(6,11-dihydrobenzo[c][1]benzothiepin-11-yl)-5-hydroxy-3-[(2R)-1-hydroxy-4-methylpentan-2-yl]-2H-pyrido[2,1-f][1,2,4]triazine-4,6-dione The above is the IUPAC name of a molecule. Write its molecular formula.
user
C27H29N3O4S
assistant