Table 4:

NMR data for compound 10 (700 MHz for ¹H and 175 MHz for ¹³C, CDCl₃).

Position	δc, type	δH, mult (J in Hz)	position	δc, type	δH, mult (J in Hz)
1	146.6, C	-	8	197.3, C	-
2	137.2, C	-	9	158.3, C	-
3	149.3, C	-	10	125.0, CH	6.56, d (3.4)
4	108.2, CH	6.60, s	10a	43.8, CH	4.24, dd (3.4, 2.8)
4a	135.9, C	-	10b	158.3, C	-
5	30.8, CH2	2.85, m	10c	118.7, C	-
6	40.8, CH2	2.64, m	11	61.2, CH3	4.04, s
7	194.8, C	-	12	56.5, CH3	3.95, s
7a	133.6, C	-	13	57.0, CH3	3.68, s
7b	48.6, CH	3.90, d (2.8)	2-OH		5.52, s