Table 2.

¹³C-NMR data (75 MHz, CDCl₃) for 3–6, 8, 10–15.

Position	δC (ppm)
	3	4	5	6	8
C-1	131.2	130.7	137.0	136.8	139.6
C-2	115.2	114.9	117.8	116.5	111.9
C-3	150.4	149.8	154.3	153.8	156.3
C-4	130.7	130.7	139.8	139.7	137.6
C-4a	147.5	147.4	151.6	151.4	150.5
C-5	117.5	101.6	117.6	99.7	99.8
C-6	134.4	162.9	134.6	164.8	165.4
C-7	123.7	113.3	124.4	113.6	114.0
C-8	126.0	127.9	127.1	128.5	128.6
C-8a	121.8	114.9	122.7	117.7	116.1
C-9	176.9	176.2	177.8	176.9	177.1
C-9a	112.8	112.6	117.8	118.0	111.0
C-10a	154.7	156.5	154.9	156.6	157.0
C-1′	-	-	-	-	39.5
1-CH3	22.4	22.4	21.7	21.5	-
3-OCH3	-	-	62.0	61.9	56.7
4-OCH3	-	-	61.4	61.2	61.8
6-OCH3	-	-	-	55.9	56.1
Position	10	12	13	14	15
C-1	133.6	128.7	129.8	129.7	129.7
C-2	108.3	115.5	108.4	107.7	106.8
C-3	156.0	156.3	156.3	156.5	156.1
C-4	140.7	140.0	138.0	137.5	136.9
C-4a	150.9	152.1	150.5	150.5	150.7
C-5	100.1	99.3	118.5	100.4	121.4
C-6	165.5	157.4	135.5	165.3	135.3
C-7	114.2	117.9	121.9	113.9	124.4
C-8	128.3	129.2	130.8	128.3	126.1
C-8a	115.9	113.8	124.9	115.3	117.8
C-9	177.1	178.8	176.0	174.7	177.0
C-9a	116.4	114.1	114.3	113.9	113.2
C-10a	157.5	165.6	157.3	157.8	154.7
C-1′	193.1	166.9	170.4	170.1	147.9
1-CH3	-	-	-	-	-
3-OCH3	56.7	61.9	62.3	61.8	56.3
4-OCH3	61.9	56.9	57.2	56.7	61.1
6-OCH3	56.1	56.4	-	56.1	-