Butanamide, N-(((1-carboxy-2-phenylethyl)amino)carbonyl)alanyl-N-((5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)dihydro-4-hydroxy-2(3H)-furanylidene)methyl)-N3-(3-hydroxyphenylalanyl)-N3-methyl-2,3-diamino-