Table 5.

¹³C NMR spectroscopic data of compounds 9–15 (150 MHz, δ in ppm)

No	9a	10b	11b	12a	13b	14a	15a
1	41.3, CH	40.4, CH	39.1, CH	146.9, C	146.1, C	144.8, C	145.0, C
2	168.1, C	163.1, C	163.5, C	131.1, C	131.4, C	134.3, C	133.9, C
3	127.9, C	128.1, C	127.9, C	52.8, CH	40.7, CH	45.8, CH	40.3, CH
4	20.3, CH2	19.9, CH2	20.0, CH2	67.5, CH	21.5, CH2	22.2, CH2	25.4, CH2
5	43.0, CH2	32.1, CH2	33.5, CH2	42.6, CH2	31.9, CH2	33.2, CH2	42.2, CH2
6	75.0, C	33.4, CH	32.2, CH	33.9, CH	31.4, CH	33.3, CH	73.3, C
7	55.7, CH	48.6, CH	48.6, CH	46.6, CH	46.2, CH	47.1, CH	53.5, CH
8	42.9, CH2	39.78, CH2c	40.1, CH2	46.5, CH2	45.3, CH2	41.4, CH2	44.0, CH2
9	37.3, C	39.84, Cc	41.6, C	38.2, C	37.1, C	43.7, C	37.1, C
10	45.1, CH2	39.0, CH2	39.2, CH2	48.7, CH2	47.8, CH2	43.8, CH2	48.1, CH2
11	72.3, CH2	70.5, CH2	70.6, CH2	66.1, CH2	66.3, CH2	66.2, CH2	66.1. CH2
12	177.6, C	175.4, C	175.5, C	60.2, CH2	63.7, CH2	61.8, CH2	63.9, CH2
13	21.1, CH3	11.5, CH3	11.6, CH3	12.9, CH3	11.6, CH3	12.1, CH3	19.9, CH3
14	31.4, CH3	26.9, CH3	26.5, CH3	29.0, CH3	28.5, CH3	22.8, CH3	29.0, CH3
15	31.1, CH3	72.2, CH2	71.4, CH2	27.3, CH3	26.8, CH3	71.6, CH2	27.2, CH3
CH3CO-		171.5, C			171.1, C		173.1, C
CH3CO-		21.2, CH3			21.1, CH3		21.0, CH3

^aRecorded in CD₃OD

^bRecorded in CDCl₃

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