Table 1. Comparison of ¹H and ¹³C NMR data for synthetic and natural phyllostictine A and ent-phaeosphaeride A in d₆-DMSO.

Atom	Phyllostictine				Atom	ent-Phaeosphaeride A8a
	Natural (Cox6)		Synthetic (this work)
	δC/ppm a	δH/ppm b , c	δC/ppm d	δH/ppm c , e		δC/ppm d	δH/ppm c , e
1	166.4		166.5		1	166.5
3	137.1		137.1		3	137.1
4	155.3		155.3		4	155.3
5	104.8		104.8		5	104.8
6	64.4	3.86, d, J = 5.6 Hz	64.3	3.79, s	6	64.3	3.87, d, J = 5.5 Hz
7	70.6		71.0		7	70.9
8	86.2	4.06, m	86.3	4.00, d, J = 11.3 Hz	8	86.2	4.07, d, J = 11.0 Hz
9	27.5	1.82, m	27.6	1.87–1.77, m	9	27.6	1.82, m
		1.55, m		1.56–1.49, m			1.57–1.39, m
10	26.3	1.44, m	26.5	1.46–1.40, m	10	26.1	1.57–1.39, m, 2H
		1.33, m		1.35–1.30, m
11	31.1	1.26, m	31.2	1.26, m	11	30.9	1.36–1.10, m, 2H
		1.19, m		1.19, m
12	21.9	1.24, m	22.1	1.24, m	12	21.9	1.36–1.10, m, 2H
13	28.5	1.25, m	28.7	1.25, m
14	28.4	1.25, m	28.6	1.25, m
15	13.8	0.85, t, J = 6.8 Hz, 3H	14.0	0.79, t, J = 6.7 Hz, 3H	13	13.8	0.86, t, J = 6.5 Hz, 3H
16	90.5	4.95, d, J = 1.5 Hz	90.9	4.96, s	14	90.7	4.97, s, 2H
		4.96, d, J = 1.5 Hz		4.96, s
17	20.2	1.17, s, 3H	19.9	1.11, s, 3H	15	20.3	1.18, s, 3H
18	63.6	3.78, s, 3H	63.8	3.72, s, 3H	16	63.7	3.79, s, 3H
6-OH		5.34, d, J = 5.9 Hz		5.37, s	6-OH		5.42, d, J = 5.5 Hz
7-OH		4.84, s		4.85, s	7-OH		4.90, s

^a100 MHz.

^b400 MHz.

^cIntegrate as 1H unless otherwise stated.

^d125 MHz.

^e500 MHz.