133155-90-5 Cyclo((S)-eta-oxo-L-alpha-aminooxiraneoctanoyl-L-phenylalanyl-L-phenylalanyl-D-2-piperidinecarbonyl) Cyclo((S)-phenylalanyl-phenylalanyl-(R)-prolyl-2-amino-8-oxo-9,10-epoxydecanoyl) Cyclo((alphaS,2S)-alpha-amino-eta-oxooxiraneoctanoyl-L-phenylalanyl-L-phenylalanyl-D-prolyl) 4 Trapoxin B