Table 2.

The contents of the 9 quality control markers in 15 batches of red clover.

Sample Number	Content of Compounds in Red Clover Extract (ng/mL)										Location
	Chlorogenic Acid	Daidzin	Calycosin-7-O-β-d-glucoside	Genistin	Ononin	Daidzein	Genistein	Formononetin	Biochanin A	Total Content
S1	85	7361	3450	5175	33647	5662	3933	35193	11729	106235	Gansu
S2	1717	18395	571	28649	72213	4678	9323	48149	40433	224128
S3	5710	2880	2812	7970	35019	3146	5696	34597	19793	117623
S4	7695	11353	29628	18027	72187	3562	4823	50069	28870	226214
S5	1291	7952	8447	24379	80374	2342	4072	36096	26756	191709
Average (S1–S5)	3300	9588	8982	16840	58688	3878	5569	40821	25516	173182
S6	397	5767	2202	3790	14945	4058	2233	22354	4359	60105	Hubei
S7	739	12847	3094	3065	16570	6484	3280	44849	5792	96720
S8	872	8382	2674	6294	18462	6727	7860	57704	35219	144194
S9	217	2834	1430	2326	16204	5783	6203	75028	45784	155809
S10	209	7003	1650	3152	11080	5944	4183	36855	8209	78285
Average (S6–S10)	487	7367	2210	3725	15452	5799	4752	47358	19873	107023
S11	4023	3955	5301	9726	39039	2501	4873	46977	34518	150913	Shanxi
S12	-	5457	3254	6584	33063	3033	3734	43176	23020	121321
S13	-	4155	5628	8145	60609	3268	5434	74243	20612	182094
S14	-	4701	5162	12056	47835	2475	4997	41490	19992	138708
S15	1345	2142	2778	6023	24024	1854	3152	33998	15880	91196
Average (S11–S15)	2684	4082	4425	8507	40914	2626	4438	47977	22804	136846
Average (S1–S15)	2025	7012	5205	9691	38351	4101	4920	45385	22731	139017

Note: “-”: indicates not detected.