You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Please write the molecular formula of the molecule (6R)-7-amino-3-[[5-(5-ethoxy-4-methyl-5-oxopentyl)-2H-triazol-4-yl]sulfanylmethyl]-8-oxo-5-thia-1-azabicyclo[4.2.0]oct-2-ene-2-carboxylic acid .
user
C18H25N5O5S2
assistant