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system
Provide the molecular formula for the IUPAC named substance 2-ethoxy-3-(2-ethoxy-4-iodo-2-oxo-1-oxa-2lambda5-phosphaspiro[4.5]dec-3-en-3-yl)-4-iodo-1-oxa-2lambda5-phosphaspiro[4.5]dec-3-ene 2-oxide .
user
C20H30I2O6P2
assistant