TABLE 2.

¹H (500 MHz) and ¹³C NMR (125 MHz) spectral data of 4-norestrogenic acid and 4-hydroxyestrone (a reference)^a

Position	4-Norestrogenic acid		4-Hydroxyestrone
	1H (δ [ppm]) (J [Hz])	13C	1H(δ [ppm]) (J [Hz])	13C
1	6.26 dd (9.9, 15.5)	145.3	6.66 d (7.8)	117.1
2	5.87 d (15.5)	131.7	6.61 d (7.8)	113.3
3		176.0		143.5
4				143.5
5	3.35 m	73.8		125.0
6	2.03 m	35.1	2.94 dd (3.8, 12.3)	24.6
	1.36 m		2.63 m
7	1.83 m	29.2	2.38 m	27.2
	1.10 m
8	1.31 m	40.9	1.47 m	39.4
9	0.93 m	47.0	2.21 m	45.5
10	1.82 m	56.3		133.0
11	1.68 m	28.0	2.10 m	27.4
	1.22 m		1.37 m
12	1.68 m	32.7	1.89 m	32.9
	1.21 m		1.44 m
13		49.4		49.4
14	1.35 m	51.8	1.54 m	51.7
15	1.95 m	22.7	2.09 m	22.5
	1.59 m		1.68 m
16	2.43 dd (8.8, 19.3)	36.8	2.51 dd (8.3, 18.4)	36.8
	2.07 dd (8.8, 19.3)		2.15 dd (8.3, 18.4)
17		223.7		224.0
18	0.89 s	14.4	0.93 s	14.3

^aMeasured in methanol-d₄.