1	EHS	2s-2-[(2,3-dihydroxyphenyl)carbonylamino]-3-[(2s)-2-[(2,3-dihydroxyphenyl)carbonylamino]-3-hydroxy-propanoyl]oxy-propanoic acid	1.000
2	2DS	N-[(2,3-dihydroxyphenyl)carbonyl]-O-[(2r)-2-{[(2,3-dihydroxyphenyl)carbonyl]amino}-3-hydroxypropanoyl]-L-serine	1.000
3	MCK	N-[(2,3-dihydroxyphenyl)carbonyl]-O-[(2s)-2-{[(2,3-dihydroxyphenyl)carbonyl]amino}-3-(L-seryloxy)propanoyl]-L-serine	0.800