You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
[(8R)-15-ethyl-11-[(1-oxidopyridin-1-ium-3-yl)methylamino]-2,12,13,17-tetrazatetracyclo[8.7.0.03,8.012,16]heptadeca-1(17),10,13,15-tetraen-9-yl] (2S)-2-aminopropanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C24H31N7O3
assistant