You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name 4-[6,8,8-trimethyl-2-oxo-3-(2-propan-2-yl-1-propylpyridin-1-ium-4-yl)-6,7-dihydropyrano[3,2-g]quinolin-9-yl]butanoic acid into its molecular formula.
user
C30H39N2O4+
assistant