Table 1.

Intracellular metabolites and their chemical shifts, before and after differentiation of human umbilical mesenchymal stem cells (Sitter et al[20], 2002 and Govindaraju et al[21], 2000)

Metabolites	1H or spin	Chemical shift (ppm)
Valine (Val)	γCH3	0.98 1.02
Fatty acids	-CH2-(CH2)n-CH2-	1.28
Lactate (Lac)	CH3	1.32
Fatty acids	(-CH2-CH3)	1.35
Fatty acids	(-CO-CH2-CH2-)	1.54
Acetate (Ace)	CH3	1.92
Glutamate (Glu)	βCH2 γCH2	2.05 2.34
Methionine (Meth)	βCH2	2.19
Succinate (Suc)	(α,βCH2)	2.41
Fatty acids	-CH=CH-Ch2-CH=CH-	2.75
Creatine (Cr)	CH3	3.05
Choline (Cho)	N-(CH3)3	3.21
Phosphocholine (PC)	N-(CH3)3	3.22
Glyocerphosphocholine (GPC)	N-(CH3)3	3.23
Taurine (Tau)	N-CH2 S-CH2	3.27 3.43
Myo-Inosito (Myo)	C1H C3H	3.54