Table 1.

NMR spectroscopic data for pitinoic acid A (1) and pitinoic acid B (2) in CDCl₃ (δ in ppm, J in Hz) at 600 MHz

C/H no.	pitinoic acid A (1)			pitinoic acid B (2)
	δC	δH(J)	HMBCa	δC	δH(J)	HMBCa
1	180.1	–	2, 3	173.3	–	2, 3
2	33.6	2.35 t (7.4)	3, 4	33.4	2.40 dt (7.8, 6.7)	3, 4
3	22.5	1.77 m	2, 4	22.7	1.79 m	2, 4
4	35.0	2.06 t (7.5)	3, 6, 11	35.2	2.06 t (7.3)	2, 3, 6, 11
5	148.7	–	3, 4, 6, 7, 11	148.9	–	3, 4, 6, 7, 11
6	35.6	1.99 t (7.5)	4, 7, 11	35.8	1.99 t (7.6)	4, 7, 11
7	27.3	1.42 m	6, 8	27.4	1.42 m	6, 8
8	31.6	1.26 m	7, 9, 10	31.7	1.26 m	6, 7, 9, 10
9	22.4	1.31 m	7, 8, 10	22.6	1.32 m	8, 10
10	13.9	0.89 t (7.1)	8, 9	14.1	0.89 t (7.1)	8, 9
11	109.5	4.72 s, 4.75 s	4, 6	109.8	4.72 s, 4.75 s	4, 6
1′				173.5	–	2′
2′				70.7	5.09 t (5.6)	3′, 4′, 5′
3′				32.5	2.64 m	2′, 4′, 5′
4′				127.3	5.9 m	2′, 3′, 5′
5′				121.4	6.12 d (13.4)	3′, 4′

^aProtons showing long-range correlation to indicated carbon.