Table 1.

¹H- and ¹³C—NMR chemical shift values of compound 1 (ppm, CD₃OD, 600 and 150 MHz respectively).

C. No.	δC	δH (J, Hz)	C. No.	δC	δH (J, Hz)
1	220.4	-	18	20.7	1.35 s
2	40.5	2.31, 2.12	19	18.2	1.27 s
3	75.0	3.84 br m, (W1/2 = 14.5)	20	78.1	-
4	41.0	2.04, 2.01 m	21	21.1	1.59
5	136.3	-	22	83.1	4.23 dd (13.2, 3.4)
6	123.6	4.58 br s	23	32.9	1.60, 1.84 overlap
7	32.6	1.77, 1.75 m	24	160.1	-
8	22.1	1.63 m	25	126.4	-
9	21.0	1.61 m	26	168.0	-
10	52.7	-	27	62.7	4.30 d (11.4), 4.31 d (11.7)
11	21.1	1.27, 1.35 m	28	18.0	2.01 s
12	20.8	1.61, 2.01 m	1′	104.0	4.36 d (7.6)
13	49.0	-	2′	75.0	3.31 t (8.1)
14	85.5	-	3′	74.0	3.65 overlap
15	22.3	1.63, 1.75 m	4′	71.6	3.33 overlap
16	32.8	1.35, 1.09 m	5′	78.0	3.33 overlap
17	50.5	2.30 t (9.4)	6′	63.5	3.64 dd (11.8, 4.8), 3.84 d (11.8)