An Efficient T₁ Contrast Agent for Labeling and Tracking Human Embryonic Stem Cells on MRI

Figure 2

Chemical structures of contrast agents. (a) MnAMP is a 1 : 1 mixture of MnTriAMP and MnTetraAMP; (b) MnPNH2; (c) MnEtP.

(a)

(b)

(c)