¹³C-NMR data comparison between 20(S)-notoginsenoside R2 and 20(R)-notoginsenoside R2 (125 MHz, pyridine-d₅). The chemical shifts were identical except for C₁₇, C₂₁, and C₂₂.

	Position	20(S)-Notoginsenoside R2	20(R)-Notoginsenoside R2
	1	39.07	39.07
	2	29.99	29.99
	3	76.22	76.22
	4	40.54	40.54
	5	60.50	60.50
	6	78.69	78.69
	7	43.87	43.87
	8	39.04	39.04
	9	49.52	49.52
	10	38.85	38.85
	11	31.90	31.90
	12	70.55	70.55
	13	48.12	48.12
	14	51.16	51.16
	15	30.55	30.55
	16	25.11	25.11
	17	53.73	54.70
	18	16.16	16.16
	19	15.64	15.64
	20	73.19	73.19
	21	26.04	26.11
	22	35.60	34.87
	23	21.88	21.88
	24	124.56	124.79
	25	130.60	130.60
	26	24.50	24.50
	27	16.30	16.30
	28	31.70	31.70
	29	16.45	16.45
	30	15.13	15.13
Glc	1′	102.47	102.47
	2′	79.32	79.32
	3′	77.92	77.92
	4′	70.69	70.69
	5′	78.29	78.29
	6′	61.53	61.53
Xyl	1′	102.49	102.49
	2′	74.18	74.18
	3′	76.88	76.88
	4′	73.04	73.04
	5′	65.53	65.53