You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Translate the chemical IUPAC name (6S,7R)-7-[[(2R)-2-amino-2-phenylacetyl]amino]-3-[(4-ethyl-5,6-dioxo-1H-1,2,4-triazin-3-yl)sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid into its molecular formula.
user
C21H22N6O6S2
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