134805-77-9 137545-03-0 A 76889 A-76889 A76889 L-Iditol, 1,2,5,6-tetradeoxy-2,5-bis((3-methyl-2-(((methyl(2-pyridinylmethyl)amino)carbonyl)amino)-1-oxobutyl)amino)-1,6-diphenyl-, (2(S)),5(S))-