You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
7-[[2-(2-amino-1,3-thiazol-4-yl)-2-methoxyiminoacetyl]amino]-3-[(1-methylpyridin-1-ium-2-yl)sulfanylmethyl]-8-oxo-4-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid is the IUPAC name of a molecule. Please give its molecular formula.
user
C20H21N6O5S3+
assistant