67655-94-1 Amastatin BRN 4727847 L-Aspartic acid, N-((2S,3R)-3-amino-2-hydroxy-5-methyl-1-oxohexyl)-L-valyl-L-valyl- L-Aspartic acid, N-(N-(3-amino-2-hydroxy-5-methyl-1-oxohexyl)-L-valyl)-L-valyl)-, (S-(R*,S*))- L-Aspartic acid, N-(N-(N-(3-amino-2-hydroxy-5-methyl-1-oxohexyl)-L-valyl)-L-valyl)-, (S-(R*,S*))- N-((2S,3R)-3-Amino-2-hydroxy-5-methyl-1-oxohexyl)-L-valyl-L-valyl-L-aspartic acid