N,N'-((1S,1'S)-(((1S,1'S)-(6-(3-Methyl-1-(2-phenyl-2-(pyrazine-2-carboxamido)acetamido)butyl)-1,3,5,2,4,6-trioxatriborinane-2,4-diyl)bis(3-methylbutane-1,1-diyl))bis(azanediyl))bis(2-oxo-1-phenylethane-2,1-diyl))bis(pyrazine-2-carboxamide) 1g

N,N'-((1S,1'S)-(((1S,1'S)-(6-(3-Methyl-1-(2-phenyl-2-(pyrazine-2-carboxamido)acetamido)butyl)-1,3,5,2,4,6-trioxatriborinane-2,4-diyl)bis(3-methylbutane-1,1-diyl))bis(azanediyl))bis(2-oxo-1-phenylethane-2,1-diyl))bis(pyrazine-2-carboxamide) 1g