You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
Can you give the molecular formula of the molecule 1-[(2R,3R,4S,5R)-4-butoxy-5-(butoxymethyl)-5-(difluoromethyl)-3-hydroxyoxolan-2-yl]pyrimidine-2,4-dione ?
user
C18H28F2N2O6
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