Table 4.

¹³C NMR spectroscopic data of compounds 1–8 (150 MHz, δ in ppm)

No	1a	2a	3b	4c	5a	6a,d	7a,d	8a
1	133.1, C	37.8, CH	170.1, C	93.7, C	143.3, C	135.39, C	136.07, C	140.6, C
2	134.5, C	145.5, C	123.3, C	156.1, C	137.9, C	131.28, C	131.65, C	126.8, C
3	46.3, CH	139.4, C	74.4, C	52.2, CH	41.1, CH	45.15, CH	47.04, CH	38.8, CH
4	31.4, CH2	29.5, CH2	26.8, CH2	26.7, CH2	38.4, CH2	34.39, CH2	35.81, CH2	31.1, CH2
5	80.0, CH	74.7, CH	30.1, CH2	29.4, CH2	112.8, C	76.79, CH	76.48, CH	73.6, CH
6	44.4, C	41.6, CH	32.4, CH	32.1, CH	43.7, CH	45.05, CH	44.91, CH	39.7, CH
7	71.4, CH	43.6, CH	48.0, CH	51.3, CH	42.9, CH	40.64, CH	40.73, CH	41.2, CH
8	44.3, CH2	45.2, CH2	43.8, CH2	37.6, CH2	45.4, CH2	47.10, CH2	47.19, CH2	45.5, CH2
9	33.4, C	37.3, C	38.9, C	41.5, C	38.4, C	38.59, C	38.46, C	39.6, C
10	39.5, CH2	47.2, CH2	49.2, CH2	48.9, CH2	48.6, CH2	47.22, CH2	47.96, CH2	47.4, CH2
11	68.2, CH2	172.7, C	168.6, C	107.1, CH2	65.3, CH2	69.53, CH2	68.56, CH2	70.9, CH2
12	111.3, CH	173.2, C	179.8, C	106.2, CH	75.1, CH2	100.99, CH	104.78, CH	182.6, C
13	18.0, CH3	12.6, CH3	11.6, CH3	14.7, CH3	12.7, CH3	14.96, CH3	14.81, CH3	12.1, CH3
14	25.6, CH3	32.0, CH3	27.3, CH3	26.1, CH3	29.3, CH3	29.78, CH3	29.70, CH3	27.5, CH3
15	32.5, CH3	31.6, CH3	28.5, CH3	71.1, CH2	27.3, CH3	28.24, CH3	28.16, CH3	29.0, CH3
1′		41.3, CH2	41.5, CH2
2′		60.4, CH2	61.0, CH2
MeO-	56.8, CH3			53.6, OCH3

^aRecorded in CD₃OD

^bRecorded in CDCl₃

^cRecorded in acetone-d₆

^dAssignments were rounded to two decimal places to tell apart the close resonances