Table 3.

¹H- (600 MHz) and ¹³C- (150 MHz) NMR and HMBC (500 MHz) data of 2 in CDCl₃.

Position	1H	13C	HMBC
			2 J	3 J
1	4.63, d, J = 7.5 Hz, 1H	78.8	-	C3, C10, C12
2	-	142.2	-	-
3	5.20, d, J = 7.5 Hz, 1H	124.8	-	C1, C12
4	2.20, m, 1H; 2.24, m, 1H	24.4	C3	C6
5	2.35, m, 2H	39.5	-	C3, C13
6	-	133.2	-	-
7	4.82, dd, J = 10.2, 4.4 Hz, 1H	125	-	C5, C9
8	1.87, m, 1H; 2.32, m, 1H	42.4	C7	C6, C10
9	-	37.3	-	-
10	5.23, d, J = 16.2 Hz, 1H	139.5	-	C1, C14, C15
11	5.56, dd, J = 16.2, 7.5 Hz, 1H	131.2	C1	C9, C13
12	1.65, s, 3H	12.8	C2	C1, C3
13	1.43, s, 3H	15.3	C6	C5, C7
14	1.04, s, 3H	24.9	C9	C8, C10, C15
15	1.06, s, 3H	29.9	C9	C8, C10, C14