Table 1:

NMR data for compound 3 (700 MHz for ¹H and 175 MHz for ¹³C, CDCl₃) and compound 5 (400 MHz for ¹H and 125 MHz for ¹³C, CDCl₃)

position	3		5
	δc, type	δH, mult (J in Hz)	δc, type	δH, mult (J in Hz)
1	146.1, C	-	146.9, C	-
2	152.9, C	-	139.2, C	-
3	111.4, CH	6.74, s	109.5, CH	6.68, s
3a	123.0, C	-	123.4	-
3b	123.6, C	-	122.2	-
4	27.3, CH2	3.17, m	23.3, CH2	2.82, dd (15.9, 5.2)
				3.12, m
5	58.7, CH2	3.84, m	43.7, CH2	3.11, m
		3.55, m		3.40, m
6a	72.8, CH	3.86, m	58.7, CH	3.63, dd (11.2, 6.2)
7	34.2, CH2	2.06, m	34.6, CH2	2.16, m
		2.97, m		2.52, m
8	30.1, CH2	2.22, m	30.4, CH2	2.33, m
		2.58, m		2.53, m
8a	134.1, C	-	135.3, C	-
9	107.3, CH	6.59, s	114.1, CH	6.79, s
10	153.9, C	-	153.7, C	-
11	141.0, C	-	141.2, C	-
12	151.5, C	-	149.5, C	-
12a	119.0, C	-	119.7, C	-
12b	128.9, C	-	128.9, C	-
13	60.6, CH3	3.56, s	39.9, CH3	2.58, s
14	56.2, CH3	3.90, s	56.3, CH3	3.93, s
15	56.1, CH3	3.24, s	61.6, CH3	3.94, s
16	56.2, CH3	3.91, s	62.6, CH3	3.66, s
17	61.1, CH3	3.88, s
18	61.1, CH3	3.75, s