2-Ethylbutanoyl-Ile-NHCH(2-oxotridecyl)-CO-Asp-Leu-OH AIDS-164980 AIDS164980 L-Leucine, N-[2-[[(2S,3S)-2-[(2-ethyl-1-oxobutyl)amino]-3-methyl-1-oxopentyl]amino]-1,4-dioxopentadecyl]-L-.alpha.-aspartyl-