3-allyl 1-benzyl (R)-2-((S)-1-((benzyloxy)carbonyl)hexahydropyridazine-3-carbonyl)tetrahydropyridazine-1,3(2H)-dicarboxylate

(R)-2-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)-D-valyl)-1-((benzyloxy)carbonyl)hexahydropyridazine-3-carbonyl)-1-((benzyloxy)carbonyl)hexahydropyridazine-3-carboxylic acid

(R)-2-((S)-2-((((9H-fluoren-9-yl)methoxy)carbonyl)-D-valyl)hexahydropyridazine-3-carbonyl)hexahydropyridazine-3-carboxylic acid