Table 1.

C₁₃ to C₄₄ and C₁₄₇ to C₁₄₉ Chemical Shifts (δ) for Maitotoxin (MTX, 1) and ABCDEFG Ring System 3 and Their Differences (Δδ, ppm)^a

carbon	δ for MTX (1) (ppm)	δ for 3 (ppm)	difference (Δδ, ppm)
13	78.8	65.8	13.0
14	35.8	36.9	−1.1
147	11.0	10.5	0.5
15	74.8	75.1	−0.3
16	69.0	69.4	−0.4
17	72.4	72.4	0.0
18	76.0	76.5	−0.5
19	76.8	76.7	0.1
20	71.4	71.5	−0.1
21	48.3	48.3	0.0
22	79.1	79.6	−0.5
148	21.5	21.6	−0.1
23	76.7	76.5	0.2
24	34.4	34.4	0.0
25	80.7	80.7	0.0
26	69.8	69.7	0.1
27	45.0	44.9	0.1
28	75.4	75.3	0.1
149	17.9	17.9	0.0
29	86.0	86.0	0.0
30	69.6	69.7	−0.1
31	85.4	85.3	0.1
32	68.2	66.2	2.0
33	38.8	38.8	0.0
34	66.5	66.3	0.2
35	81.0	81.0	0.0
36	73.1	73.0	0.1
37	67.3	67.5	−0.2
38	37.4	37.8	−0.4
39	72.3	73.5	−1.2
40	78.9	73.3	5.6
41	68.5	72.7	−4.2
42	80.6	69.4	11.2
43	69.6	74.0	−4.4
44	36.3	64.6	−28.3

^a150 MHz, 1:1 methanol-d₄:pyridine-d₅