Table 2.

¹³C NMR data of 1 − 4 in CDCl₃

No	1a	2a	3b	4b
2	92.3, C	88.1, C	93.0, C	89.4, C
3	190.8, C	194.6, C	190.8, C	194.2, C
3a	104.1, C	105.3, C	105.0, C	105.9, C
4	159.6, C	159.3, C	158.3, C	158.0, C
5	93.9, CH	93.9, CH	90.1, CH	89.9, CH
6	170.7, C	171.0, C	165.0, C	165.2, C
7	89.0, CH	89.1, CH	97.8, C	97.9, C
7a	175.9, C	175.9, C	169.3, C	169.3, C
2'	168.7, C	169.1, C	168.1, C	168.5, C
3'	104.0, CH	104.9, CH	104.2, CH	105.1, CH
4'	195.7, C	195.9, C	195.4, C	195.6, C
5'	46.1, CH2	47.2, CH2	46.1, CH2	47.2, CH2
6'	74.8, C	74.5, C	74.7, C	74.7, C
4-OCH3	56.3, CH3	56.4, CH3	56.6, CH3	56.6, CH3
6-OCH3	56.3, CH3	56.4, CH3	57.2, CH3	57.2, CH3
2'-OCH3	56.8, CH3	56.8, CH3	56.9, CH3	56.9, CH3
6'-CH3	23.3, CH3	23.7, CH3	23.3, CH3	23.9, CH3

^a13C NMR tested with 100 MHz.

^b13C NMR tested with 150 MHz.