Biotin-L-Val-L-Ala-L-Asp(OMe)-fluoromethyl ketone Biotin-VAD-FMK Biotin-Val-Ala-Asp(OMe)-fluoromethyl ketone L-alaninamide, N-[6-[[5-[(3aS,5S,6aR)-hexahydro-2-oxo-1H-thieno[2,3-d]imidazol-5-yl]-1-oxopentyl]amino]-1-oxohexyl]-L-valyl-N-[(1S)-3-fluoro-1-(2-methoxy-2-oxoethyl)-2-oxopropyl]-