185980-89-6 L-Isoleucine, N2-acetyl-L-glutaminyl-3-hydroxy-4-methylprolyl-L-leucyl-(alphaS)-3-amino-6-hydroxy-alpha-((1S)-1-methylpropyl)-2-oxo-1-piperidineacetyl-N-methyl-L-tyrosyl-, (6-2)-lactone Nostopeptin B