You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (4S)-2-amino-4-(4-bromophenyl)-7-methyl-6-(2-morpholin-4-ylethyl)-5-oxo-4H-pyrano[3,2-c]pyridine-3-carbonitrile into its molecular formula.
user
C22H23BrN4O3
assistant