Table 1.

NMR data of 9-O-methylneuchromenin (1).

Position	δ C a,b	δH a,c (mult, J in Hz)	HMBC
2	77.3	4.72 (m)
3	43.5	2.53 (m)	2, 4, 11
4	191.0	-	-
4a	102.4	-	-
5	64.1	5.03 (d, 12.0),4.73 (d, 12.0)	4, 4a, 6a, 10b
6a	156.3	-	-
7	104.8	6.34 (s)	6a, 8, 9, 10, 10b
8	154.5	-	-
9	144.8	-	-
10	108.9	7.06 (s)	6a, 8, 9, 10, 10b
10a	107.9	-
10b	165.7	-	-
11	20.6	1.55 (d, 6.4)	2, 3, 4
12	57.0	3.83 (s)	9

^a Recorded in CD₃OD, ^b 100 MHz, ^c 400 MHz.