You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
4-[13-[2-[1-(6-methoxypyridin-3-yl)ethenyl-methylamino]-2-methyliminoethyl]-3,4,10-trimethyl-16-oxo-15-propan-2-yl-2,3,5,6,7,8,9,11,12,17-decahydro-1H-cyclopenta[a]phenanthren-4-yl]butan-2-yl 3-methyl-3-(5-methyl-2-propan-2-ylpyridin-1-ium-1-yl)-4-oxobutanoate The above is the IUPAC name of a molecule. Write its molecular formula.
user
C53H77N4O5+
assistant