You are a chemist. Please follow the instructions to convert the structure to the corresponding name.
system
2-[[[4-[4-(ethylcarbamoylamino)-5H-pyrido[2,3-d]pyrimidin-8-yl]-2-methyl-2-phenyl-3a,4,6,6a-tetrahydrofuro[3,4-d][1,3]dioxole-6-carbonyl]amino]methyl]-3-fluorobenzoic acid The above is the IUPAC name of a molecule. Write its molecular formula.
user
C31H31FN6O7
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