Table 1.

¹H, ¹³C, and HMBC NMR spectral data for chlorizidine A (1) (CD₃CN)

C no.	δCa	δH, mult. (J, Hz)b	HMBCb
2,3,5a,14,15c
1	101.9	6.55, br s
5	163.0
6	163.9
7	113.3d
8	157.5
9	108.2	6.42, s	5,7,9a,9b
9a	135.5e
9b	132.7e
10	53.0	5.80, ddf	6-8,11
11	32.5	2.84, m	7,12,12a
		2.54, m	6-8,10,12,12a
12	25.4	3.08, m	10,11,12a,13
		2.90, m	10,11,12a,13
12a	136.8
13	99.3	5.80, sf	12a,14

^a75 MHz.

^b500 MHz.

^cδ_C = 116.9, 113.0^d, 109.7, 106.0, 105.9.

^{d, e}Signals may be switched.

^fOverlapping signals.