Table 5.

The ¹H and ¹³C NMR (DMSO-d₆, 500.13 and 125.4 MHz) and HMBC assignment for 6.

Position	δC, Type	δH, (J in Hz)	COSY	HMBC
2	161.3, C	-	-	-
3	112.3, C	-	-	-
4	172.2, CO	-	-	-
4a	115.1, C	-	-	-
5	108.0, CH	7.26, s	-	C-4, 6, 7, 8a
6	144.7, C	-	-	-
7	150.2, C	-	-	-
8	102.8, CH	6.84, s	-	C-4, 4a, 6, 7, 8a
8a	152.5, C		-	-
9α	33.4 CH2	3.47, d (19.2)	H-9β	C-2, 3, 10, 13, 15
9β		2.98, d (19.2)	H-9α	C-2, 3, 10, 13, 15
10	78.2, C	-	-	-
12	71.4, CH	5.41, s	-	C-2, 3, 3′,4, 4′, 10, 14
13	29.3, CH3	1.51, s	-	C-2, 9, 10, 14, 15
14	200.9, CO	-	-	-
15	69.8, CH	5.23, s	H-17	C-9, 10, 13, 14, 16
16	204.6, CO	-	-	-
17	32.7, CH3	2.16, s	H-15	C-15, 16
2′α	67.7, CH2	4.36, d (12.8)	H-2′β	C-3′, 4, 8′a, 12, 14
2′β		3.59, d (12.8)	H-2′α, 15	C-3′, 4, 8′a, 12, 14
3′	61.9, C	-	-	-
4′	185.3, CO	-	-	-
4′a	109.8, C	-	-	-
5′	111.1, CH	7.17, s	-	C-4′, 6′, 7′, 8′a
6′	141.1, C	-	-	-
7′	155.4, C	-	-	-
8′	102.6, CH	6.37, s	-	C-4′, 4′a, 6′, 8′a
8′a	156.0, C	-	-	-