Table 2.

¹³C (100 MHz, CD₃OD) NMR data for compounds 1–4^a

Position	1	2	3	4
	δC
2	145.8	145.8	145.8	145.8
4	149.4	149.4	149.3	149.3
5b	125.5	125.5	125.5	125.5
6	157.7	157.7	157.7	157.7
8	140.2	140.3	140.2	140.2
1′	90.2	88.6	90.2	88.6
2′	72.6	74.9	72.4	74.5
3′	74.6	72.9	74.7	72.6
4′	76.9	78.3	77.0	78.2
5′	57.5	57.4	55.0	54.5
7′	38.0	38.1	37.3	37.3
2″	133.8	133.8	133.8	133.8
3″	106.8	106.8	106.8	106.8
3a″	126.7	126.7	126.7	126.7
4″	106.0	106.0	106.0	106.0
5″	149.4	149.4	149.3	149.3
6″	105.0	105.0	105.4	105.0
7″	115.8	115.8	115.8	115.8
7a″	131.9	131.9	131.8	131.8
8″	164.5	164.5	164.5	164.5

^aChemical shifts were assigned based on gHSQC and gHMBC spectral data.

^bNo signal was observed in the ¹³C spectrum.