Table 2.

Comparison of ¹³C NMR data of helvolic acid from the present study in DMSO with published data in CDCl₃ (Fujimoto et al. 1996).

	13C δ (ppm)			13C δ (ppm)			13C δ (ppm)
	Present study	Published values	C#	Present study	Published values	C#	Present study	Published values
1	158.42	157.3	12	25.50	25.9	23	28.00	28.3
2	126.86	127.8	13	46.08	49.4	24	123.24	122.8
3	200.88	201.4	14	45.51	46.6	25	131.67	132.9
4	40.04	40.4	15	40.34	40.6	26	17.64	17.8
5	48.01	47.2	16	73.04	73.5	27	25.33	25.7
6	73.08	73.8	17	144.34	147.6	28	12.29	13.1
7	209.26	208.8	18	17.64	17.9	29	17.69	18.3
	52.25	52.7	19	27.17	27.5	30/32	169.10/169.68	168.9/170.3
9	41.19	41.7	20	131.02	130.5	31/33	20.38/20.44	20.7/20.5
10	37.70	38.2	21	171.01	174.2
11	23.1	23.9	22	28.26	28.6