Antibacterial Activity of Two Flavans from the Stem Bark of Embelia schimperi

Table 2

¹H-NMR, ¹³C-NMR, and 2D spectral data of compound 1 in DMSO-d_6.

Position	^1H-NMR	^13C-NMR	COSY	HMBC
2	4.73 (1H, s, H-2)	78.5	H2-H3	H2-C1′,3,4
3	4.01 (1H, m, J = 2.1 Hz, H-8)	65.4	H2-H3	H3-C1′,2,4, 4a
4	2.67 (2H, dd, J = 16.5, 4.5 Hz, H-4)	28.7	H3-H4	H4-C2,3,4a, 5, 8a
4a	—	99.0
5	—	156.9
6	5.73 (1H, d, J = 1.2 Hz)	95.6		H6-C4a, 5,7,8
7	—	156.7
8	5.89 (1H, d, J = 1.2 Hz)	94.6		H8-C6,7,8a,4a
8a	—	156.2
1′	—	131.1
2′	6.67 (1H, dd, J = 8.1, 2.1 Hz)	115.2
3′	—	144.6
4′	—	144.7
5′		115.4
6′	6.88 (1H, dd, J = 8.1, 2.1 Hz)	118.4	H5′-H6′	H6′-C1′,3′,4′,5′