Butanamide, N-(((1-carboxy-2-(3-hydroxyphenyl)ethyl)amino)carbonyl)methionyl-N-((5-(3,4-dihydro-2,4-dioxo-1(2H)-pyrimidinyl)dihydro-4-hydroxy-2(3H)-furanylidene)methyl)-N3-methyl-N3-((1,2,3,4-tetrahydro-6-hydroxy-3-isoquinolinyl)carbonyl)-D-2,3-diamino-