1	HU4	Tert-butyl {(1s)-2-[(1r,2s,5r)-2-({[(1s)-3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]amino}carbonyl)-7,7-dimethyl-6-oxa-3-azabicyclo[3.2.0]hept-3-yl]-1-cyclohexyl-2-oxoethyl}carbamate	1.000
2	HU1	Tert-butyl {(1s)-2-[(1r,2s,5s)-2-({[(1s)-3-amino-1-(cyclobutylmethyl)-2,3-dioxopropyl]amino}carbonyl)-6,6-dimethyl-3-azabicyclo[3.1.0]hex-3-yl]-1-cyclohexyl-2-oxoethyl}carbamate	0.927