(R)-N-(3-Methyl-1-oxobutyl)-L-valyl-N-(1-((2-ethoxy-2-oxoethyl)hydroxyphosphinyl)-3-methylbutyl)-L-valinamide 128901-52-0 Isovaleryl-valyl-valyl-statine phosphinate ethyl ester Iva-val-val-sta(P)oet Ivavvsta(P)oet L-Valinamide, N-(3-methyl-1-oxobutyl)-L-valyl-N-(1-((2-ethoxy-2-oxoethyl)hydroxyphosphinyl)-3-methylbutyl)-, (R)-