You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
3-[5-[[2-(2,5-dioxopyrrol-1-yl)acetyl]amino]pentylsulfamoyl]-4-(3-oxa-23-aza-9-azoniaheptacyclo[17.7.1.15,9.02,17.04,15.023,27.013,28]octacosa-1(27),2(17),4,9(28),13,15,18-heptaen-16-yl)benzenesulfonate is the IUPAC name of a molecule. Please give its molecular formula.
user
C42H45N5O9S2
assistant