1 FYQ N~2~-{(2r)-4-(methylamino)-4-oxo-2-[4-(phosphonooxy)benzyl]butanoyl}-L-glutaminyl-L-aspartamide 1.000 2 YEN N-{(2s)-4-(methylamino)-4-oxo-2-[4-(phosphonooxy)benzyl]butanoyl}-L-alpha-glutamyl-L-aspartamide 0.949 3 FYI N-{(2s)-4-(methylamino)-4-oxo-2-[4-(phosphonooxy)benzyl]butanoyl}-L-isoleucyl-L-aspartamide 0.923 4 TVN N-{(2r)-4-(methylamino)-4-oxo-2-[4-(phosphonooxy)benzyl]butanoyl}-L-valyl-L-aspartamide 0.897