Table 2.

The ¹³C-NMR (150 MHz) data of compounds 1−5 in DMSO-d_6.

Position	1	2	3	4	5
	δc, Type	δc, Type	δc, Type	δc, Type	δc, Type
1	63.6, CH	66.2, CH	60.4, CH	70.2, CH	59.9, CH
2	74.8, CH	74.0, CH	33.0, CH2	77.4, CH	59.2, CH
3	41.6, CH	33.3, CH	28.1, CH	74.2, C	58.2, C
4	197.7, C	69.5, CH	68.7, CH	73.5, CH	67.7, CH
4a	134.0, C	143.9, C	144.2, C	143.6, C	142.6, C
5	119.8, CH	124.4, CH	125.1, CH	122.5, CH	121.6, CH
6	150.9, C	150.2, C	150.0, C	150.4, C	150.5, C
6a	132.5, C	126.7, C	126.2, C	126.2,C	125.1, C
6b	127.9, C	128.9, C	128.9, C	129.1, C	128.9, C
7	151.8, C	151.0, C	151.0, C	151.1, C	151.0, C
8	120.5, CH	119.6, CH	119.4, CH	120.0, CH	119.5, CH
9	131.8, CH	130.6, CH	130.5, CH	130.7, CH	130.5, CH
10	117.7, CH	117.7, CH	117.6, CH	118.0, CH	117.6, CH
10a	135.3, C	134.7, C	134.8, C,	134.5, C	134.7, C
11	192.1, C	193.4, C	193.2, C	194.4, C	193.0, C
11a	131.6, C	132.0, C	131.1, C	130.8, C	130.6, C
11b	134.7, C	129.8, C	131.5, C	131.7, C	128.3, C
12	11.3, CH3	12.2, CH3	17.2, CH3	15.4, CH3	18.8, CH3
13	57.5, CH3	57.4, CH3	57.4, CH3	57.4, CH3	57.4, CH3