Table 1.

NMR spectroscopic data for natural, geranium-derived, and synthetic l-quisqualic acid (Fig. 6) (δ ppm)

NaturalSynthetic
Positionδ 1Hδ 13Cδ 1Hδ 13C
1172.5172.54
24.0054.344.0054.30
33.9851.133.9851.10
4174.61174.55
5168.70168.65