BMC Pharmacology

Table 1 1D and 2D NMR spectral data for 3-carboxy-1-methyl pyridinium obtained in CD₃OD (δ in ppm).

From: A pyridinium derivative from Red Sea soft corals inhibited voltage-activated potassium conductances and increased excitability of rat cultured sensory neurones

No.	δ_C		δ_H (#H, m, J/Hz)	¹H-¹H COSY	HMBC (δ_C to δ_H)
2	147.0	CH	9.33 (1H, s)	H-6, H-8	H-4, H-6, H-8
3	162.0	qC
4	147.0	CH	8.95 (1H, s)	H-5	H-2, H-5, H6
5	127.7	CH	8.11 (1H, bt)	H-4, H-6	H-4, H-6
6	145.2	CH	8.96 (1H, s)	H-2, H-5, H-8	H-2, H-4, H-8
7	166.0	qC
8	47.6	CH₃	4.43 (3H, s)	H-2, H-6	H-6

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