Table 4. Phenolic components (mg/L) in hydro-ethanol extracts of Dalbergia ecastaphyllum (mean ± SD) by HPLC-PAD.

Compounds	Retention time (min)	Content (mg/L)
		T1	T2	T3	T4	T5	T6	T7
Caffeic acid	23.775	nd	nd	0.26 ± 0.01	0.29 ± 0.01	nd	nd	nd
Catechin	17.35	12.49 ± 0.62	6.62 ± 0.33	28.03 ± 1.40	19.95 ± 1.00	1.56 ± 0.08	3.68 ± 0.18	26.32 ± 1.32
Epicatechin	24.419	0.80 ± 0.04	0.65 ± 0.03	1.35 ± 0.07	0.91 ± 0.05	nd	nd	0.91 ± 0.05
Naringenin	54.98	0.64 ± 0.03	0.36 ± 0.02	1.39 ± 0.07	1.23 ± 0.06	0.26 ± 0.01	0.77 ± 0.04	1.39 ± 0.07
Naringin	41.85	1.99 ± 0.10	1.67 ± 0.08	1.70 ± 0.08	1.28 ± 0.06	1.28 ± 0.06	3.72 ± 0.19	3.73 ± 0.19
Protocatechuic acid	12.12	1.65 ± 0.08	1.13 ± 0.06	2.53 ± 0.13	1.37 ± 0.07	2.34 ± 0.12	1.60 ± 0.08	1.66 ± 0.08
Quercetin	58.658	nd	nd	0.93 ± 0.05	0.98 ± 0.05	nd	nd	nd
Rutin	44.68	10.49 ± 0.52	4.83 ± 0.24	18.52 ± 0.93	17.98 ± 0.90	11.04 ± 0.55	8.00 ± 0.40	20.23 ± 1.01
Sinapic acid	35.90	0.63 ± 0.03	0.28 ± 0.01	0.95 ± 0.05	0.94 ± 0.05	0.65 ± 0.03	0.50 ± 0.02	1.28 ± 0.06
Vanillic acid	22.88	1.35 ± 0.07	0.90 ± 0.04	2.19 ± 0.11	1.45 ± 0.07	0.99 ± 0.05	1.42 ± 0.07	2.07 ± 0.10
β -resorcylic acid	25.91	10.37 ± 0.52	6.72 ± 0.34	14.54 ± 0.73	22.12 ± 1.11	8.66 ± 0.43	8.03 ± 0.40	20.72 ± 1.04

nd: not detectable.