You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Provide the molecular formula for the IUPAC named substance 2-[7-[(2-methyl-1,3-benzoselenazol-3-ium-3-yl)methyl]-3-[2-tri(propan-2-yl)silylethynyl]pyren-1-yl]ethynyl-tri(propan-2-yl)silane .
user
C47H58NSeSi2+
assistant