3-O-tert-butyl 1-O-[[5-[[4-[N'-(2,2-dimethylpropoxycarbonyl)carbamimidoyl]anilino]-[2-fluoro-3-(2-hydroxyethoxy)-5-methoxyphenyl]methyl]-2-pyrimidin-2-yl-1,2,4-triazol-3-yl]oxymethyl] 2,2-dimethylpropanedioate