Table 1.

¹H-(500 MHz) and ¹³C (125 MHz) NMR spectroscopic data of 1 and 2 recorded in CDCl₃ (ẟ in ppm).

	Compound 1			Compound 2
Position	ẟ C	ẟ H	HMBC	ẟ C	ẟ H	HMBC
2	152.5	7.80	3, 4, 8a, 1′	152.0	7.94	3, 4, 8a, 1′
3	122.5	-		124.3	-
4	175.0	-		175.9	-
4a	113.7	-		118.4	-
5	153.0	-		127.8	8.22	4, 7, 8, 8a
6	152.9	-		115.0	7.01	8, 4a
7	157.6	-		163.2	-
8	96.1	6.72	4, 6, 7	100.9	6.88	7, 4a, 8a
8a	154.6	-		157.9	-
1′	112.8	-		124.9	-
2′	140.5	-		130.2	7.52	3, 3′, 4′
3′	95.3	6.63	2′, 4′, 5′	114.0	6.99	1′, 2′, 4′, 5′
4′	148.4	-		159.6	-
4′-OMe	-	-		55.4	3.86	4′
5′	141.1	-		114.0	6.99	1′, 2′, 4′, 5′
6′	111.4	6.85	2′, 4′, 5′	130.2	7.52	3, 3′, 4′
O-CH2-O	101.3	5.97	4′, 5′	-	-
5-OMe	56.3	3.98	5	-	-
6-OMe	56.8	3.75	6	-	-
7-OMe	62.1	3.97	6, 7	-	-
2′-OMe	61.6	3.93	2′	-	-
1″	-	-		65.5	4.66	7, 2″, 3″
2″	-	-		119.3	5.55	3″-Me, 3″, 4″
3″	-	-		141.1	-
3″-Me	-	-		16.8	1.78	2″, 3″, 4″
4″	-	-		42.2	2.82	2″, 3″-Me, 6″
5″	-	-		140.5	5.70	4″, 6″, 7″
6″	-	-		123.9	5.66	4″
7″	-	-		70.7	-
8″	-	-		29.9	1.35	6″, 7″