Table 1.

NMR data of pseudoceratonic acid (1) (CD₃OD) ^a.

No.	δC (mult.)	δN b	δH (mult.)	1H-13C HMBC	1H-15N HMBC
1	31.0, CH3		2.23 (3H, s)	C-2, C-3
2	209.3, qC
3	50.7, CH2		2.91 (2H, s)	C-2, C-4, C-6	N-7
4	53.4, qC
5	26.0, CH3		1.42 (3H, s)	C-3, C-4	N-7
6	26.0, CH3		1.42 (3H, s)	C-3, C-4	N-7
N-7		−331.6

^{a 1}H and ¹³C NMR were acquired at 400 and 100 MHz, respectively. ^{b 15}N Signal was traced from ¹H-¹⁵N HMBC and was referenced to CH₃NO₂ at 0.0 ppm.