What is the molecular formula of the compound with this IUPAC name 2-[7-[2-[[2-[tert-butyl(dimethyl)silyl]oxy-1,1,1-trifluoro-4-methylpentan-3-yl]amino]-2-oxoethyl]-2,4,8-trioxo-1H-pyrido[3,4-d]pyrimidin-3-yl]acetic acid ?