benzyl (S)-2-(N-(N-(benzyloxy)-N-((R)-1-((benzyloxy)carbonyl)hexahydropyridazine-3-carbonyl)-L-alanyl)-N-methyl-D-alanyl)-3-(((2R,3S)-3-((tert-butyldimethylsilyl)oxy)-1-methoxy-1-oxobutan-2-yl)carbamoyl)tetrahydropyridazine-1(2H)-carboxylate