Table 2.

1D (¹H and ¹³C) NMR data of flavimycin C (2a and 2b).

Pos	2a		2b
	δC,a,c type	δHb (J in Hz)	δC,a,c type	δHb (J in Hz)
1	108.0, CH	6.18 (s, 1H)	106.6, CH	6.24 (d, 2.2, 1H)
3	84.5, CH	5.10 (d, 8.3, 1H)	85.0, CH	5.35, (dd, 7.0, 2.2, 1H)
4	116.6, C		116.9, C
5	137.7, C		137.6, C
6	134.3, C		134.2, C
7	145.0, C		144.9, C
8	110.8, C		110.5, C
9	125.8, C		126.2, C
10	11.1, CH3	2.00 (s, 3H)	11.1, CH3	1.99 (s, 3H)
11	54.2, CH3	3.37 (s, 3H)	52.0, CH3	3.12 (s, 3H)
1′	72.8, CH2	α 4.93 (d, 11.0, 1H)	72.9, CH2	α 4.96 (d, 10.4, 1H)
		β 5.10 (dd, 11.0, 2.5, 1H)		β 5.22 (dd, 10.4, 5.1, 1H)
3′	87.2, CH	5.20 (m, overlapped, 1H)	86.4, CH	5.21 (m, overlapped, 1H)
4′	114.5, C		114.8, C
5′	138.5, C		138.2, C
6′	132.3, C		132.5, C
7′	144.8, C		145.0, C
8′	108.2, C		108.4, C
9′	128.5, C		128.3, C
10′	12.1, CH3	1.92 (s, 3H)	12.1, CH3	1.94 (s, 3H)

Measured in DMSO-d₆ ^aat 175 MHz / ^bat 700 MHz.

^cAssignment confirmed by HMBC and HSQC spectra.