Qualitative and Quantitative Evaluation of Chemical Constituents from Shuanghuanglian Injection Using Nuclear Magnetic Resonance Spectroscopy

Table 2

Chemical shift and signals assignment of quantitative protons for seven primary metabolites.

Primary metabolites	Chemical shift and signals assignment of the quantitative protons
Valine	0.99 (γ-H3)
Glucose	5.24 (αH-1), 4.65 (βH-1)
Fructose	4.12 (α-f H-3, β-f H-3, H-4), 4.03 (β-p H-6a), 4.00 (β-p H-5, α-f H-4)
Mannose	5.19 (αH-1), 4.90 (βH-1)
Sucrose	5.42 (H-1)
Succinic acid	2.48 (H-2, H-3)
myo-inositol	4.06 (H-1)