1H-Pyrido[2,3-b][1,4]oxazine-1-carboxylic acid, 2,3-dihydro-8-methyl-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, 1,1-dimethylethyl ester

1H-Pyrido[2,3-b][1,4]oxazine-1-carboxylic acid, 2,3-dihydro-8-methyl-7-(4,4,5,5-tetramethyl-1,3,2-dioxaborolan-2-yl)-, 1,1-dimethylethyl ester