Table 2.

¹³C NMR data of compounds 1-5 (150 MHz, CDCl₃).

Position	1	2	3	4	5
1	170.6, C	170.6, C	170.5, C	170.5, C	170.4, C
3	78.7, CH	78.6, CH	78.5, CH	78.5, CH	78.3, CH
4	30.6, CH2	30.7, CH2	30.7, CH2	30.7, CH2	30.6, CH2
4a	139.5, C	139.4, C	139.4, C	139.5, C	139.4, C
5	113.1, C	113.2, C	113.0, C	112.9, C	113.0, C
6	160.9, C	161.0, C	160.7, C	160.5, C	160.6, C
7	101.6, CH	101.6, CH	101.6, CH	101.6, CH	101.7, CH
8	162.5, C	162.5, C	162.5, C	162.5, C	162.6, C
8a	102.1, C	102.0, C	102.1, C	102.2, C	102.2, C
1’	35.1, CH2	35.0, CH2	34.9, CH2	35.1, CH2	34.8, CH2
2’	25.1, CH2	25.0, CH2	24.9, CH2	25.6, CH2	24.6, CH2
3’	29.5, CH2	29.4, CH2	29.0, CH2	25.2, CH2	24.8, CH2
4’	29.3, CH2	25.7, CH2	23.6, CH2	36.8, CH2	34.0, CH3
5’	31.9, CH2	39.2, CH2	43.7, CH2	73.3, CH	174.1, C
6’	22.8, CH2	68.4, CH	209.3, C	30.4, CH2	51.7, CH3
7’	14.2, CH3	23.7, CH3	30.1, CH3	10.0, CH3
5-Me	10.6, CH3	10.6, CH3	10.6, CH3	10.6, CH3	10.6, CH3