177742-52-8 Cyclo(glycyl-O-(1,1-dimethyl-2-propenyl)-L-seryl-(4R)-2-((1S)-1-amino-3-methylbutyl)-4,5-dihydro-4-thiazolecarbonyl-L-isoleucyl-L-prolyl) Keenamide A L-Serine, N-((2-(1-amino-3-methylbutyl)-4,5-dihydro-4-thiazolyl)carbonyl)-L-isoleucyl-L-prolylglycyl-O-(1,1-dimethyl-2-propenyl)-, cyclic(4-1)-peptide, (R-(R*,S*))-