143037-36-9 Ac-Dip-leu-asp-ile-ile-trp Acetyldiphenylalanyl-leucyl-aspartyl-isoleucyl-isoleucyl-tryptophan L-Tryptophan, N-(N-(N-(N-(N-(N-acetyl-3-(1,1'-biphenyl)-4-yl-D-alanyl)-L-leucyl)-L-alpha-aspartyl)-L-isoleucyl)-L-isoleucyl)- N-(N-(N-(N-(N-(N-Acetyl-3-(1,1'-biphenyl)-4-yl-D-alanyl)-L-leucyl)-L-alpha-aspartyl)-L-isoleucyl)-L-isoleucyl)-L-tryptophan PD 142893 PD-142893