Table 2.

¹³C NMR spectroscopic data of compounds 1–6 (150 MHz, δ in ppm)

No.	1 a	2 a	3 a	4 a	5 a	6 b
1	139.4, C	138.0, C	139.1, C	137.6, C	148.7, C	138.1, C
2	133.2, C	133.8, C	133.5, C	134.1, C	130.6, C	130.0, C
3	42.4, CH	46.6, CH	42.4, CH	46.5, CH	39.3, CH	41.5, CH
4	37.2, CH2	37.1, CH2	37.3, CH2	37.2, CH2	34.0, CH2	34.5, CH2
5	178.3, C	174.3, C	178.3, C	174.3, C	180.5, C	174.3, C
6	144.2, CH	144.5, CH	144.0, CH	144.3, CH	71.4, CH	66.3, CH
7	49.3, CH	48.7, CH	48.3, CH	48.8, CH	49.2, CH	47.9, CH
8	44.4, CH2	44.3, CH2	44.1, CH2	44.2, CH2	42.5, CH2	39.9, CH2
9	44.6, C	44.7, C	44.8, C	44.8, C	38.4, C	37.4, C
10	42.7, CH2	42.6, CH2	42.9, CH2	42.6, CH2	46.5, CH2	48.5, CH2
11	70.2, CH2	69.4, CH2	70.2, CH2	69.5, CH2	60.1, CH2	71.5, CH2
12	110.6, CH	102.7, CH	110.5, CH	102.7, CH	73.9, CH2	109.8, CH
13	115.0, CH2	114.5, CH2	115.1, CH2	114.5, CH2	19.4, CH3	20.7, CH3
14	69.2, CH2	69.3, CH2	23.1, CH3	23.2, CH3	29.6, CH3	27.4, CH3
15	24.5, CH3	24.5, CH3	70.9, CH2	71.1, CH2	28.6, CH3	28.6, CH3
16		52.3, CH3		52.3, CH3

^aRecorded in CD₃OD, recorded in 150 MHz

^bRecorded in CDCl₃, recorded in 200 MHz