You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 6,6,7-triethyl-7-methyl-10-[3-(3-phenyl-5-thiophen-2-ylphenyl)phenyl]benzo[a]quinolizin-5-ium into its molecular formula.
user
C42H40NS+
assistant