Table 1.

NMR data of 1–3 (CD₃OD, δ in ppm, J in Hz).

Position		1 a			2 a			3 b
		δ H	δC, Type		δ H	δC, Type		δ H	δC, Type
2		4.03, s	73.9, CH		-	131.4, C		-	131.4, C
3		2.89, d (4.7)	67.5, CH		4.61, s	71.7, CH		4.60, brs	71.6, CH
5	α β	3.30, m 3.17, m	53.2, CH2	a/b	3.72, dd (9.2, 4.0)	69.2, CH2	a/b	3.69, m	69.2, CH2
6	α β	2.50, m 2.29, m	44.6, CH2	a/b	3.06, m	20.6, CH2	α β	3.07, m 2.98, m	20.6, CH2
7		-	58.0, C		-	106.3, C		-	106.2, C
8		-	133.4, C		-	128.0, C		-	128.0, C
9		7.08, dd (7.5, 1.3)	123.6, CH		6.93, d (2.4)	101.0, CH		6.91, d (2.0)	101.0, CH
10		6.72, td (7.5, 1.3)	120.1, CH		-	155.6, C		-	155.6, C
11		7.02, td (7.5, 1.3)	129.4, CH		6.78, dd (8.8,2.4)	113.3, CH		6.79, dd (8.2,2.0)	113.3, CH
12		6.59, dd (7.5, 1.3)	111.0, CH		7.24, d (8.8)	113.2, CH		7.20, d (8.2)	113.2, CH
13		-	152.7, C		-	133.9, C		-	133.9, C
14	α β	2.12, m 1.78, m	25.8, CH2	α β	2.58, td (13.6,4.9) 2.25, d (13.6)	28.6, CH2	α β	2.53, m 2.23, m	28.4, CH2
15		2.93, d (4.7)	39.7, CH		1.54, overlap	30.7, CH		1.49, overlap	30.6, CH
16		-	85.8, C	β α	2.07, dd (13.4,3.7)1.54, overlap	23.6, CH2		2.13, m	52.3, CH
17		-	174.4, C	α β	3.57, m 3.05, m	59.2, CH2	α β	3.51, overlap3.01, m	59.1, CH2
18		0.96, t (7.4)	11.8, CH3		5.15, m	118.4, CH2		5.11, m	118.5, CH2
19	a b	1.30, m 1.22, m	24.5, CH2		5.69, d (16.9)	138.3, CH		5.65, m	138.3, CH
20		1.83, t (7.6)	55.0, CH		2.17, m	52.3, CH	a b	2.03, m 1.49, overlap	23.6, CH2
21		4.59, s	97.5, CH		3.59, m	63.9, CH2	a b	3.58, m 3.51, overlap	63.8, CH2
OCH3		3.82, s	53.2, CH3		3.80, s	56.2, CH3		3.78, s	56.2, CH3

^a1H NMR spectra of 1 and 2 were recorded at 600 MHz and ¹³C NMR was recorded at 150MHz. ^{b 1}H NMR spectrum of 3 was recorded at 400 MHz and ¹³C NMR was recorded at 100 MHz.