8-[2-[[2-(4-Ethoxyphenyl)-1,1-dimethylethyl]amino]-1-hydroxyethyl]-6-hydroxy-2H-1,4-benzoxazin-3(4H)-one

8-(2-{[1-(4-Ethoxyphenyl)-2-methylpropan-2-yl]amino}-1-hydroxyethyl)-6-hydroxy-2H-1,4-benzoxazin-3(4H)-one