You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
(4R,5R)-3-butyl-7-(dimethylamino)-5-[3-[(1-methylpyridin-1-ium-4-yl)amino]phenyl]-1,1-dioxo-2,3,4,5-tetrahydro-1lambda6-benzothiepin-4-ol;pentane is the IUPAC name of a molecule. Please give its molecular formula.
user
C33H48N3O3S+
assistant